Srate 1pc Optical Glass 100mm Diameter Focal Length -300mm Large Optics Double Concave Lens

Double Concave. Perfect for Spinning Tops. Optical glass Large Optics Double Concave Lens. Package : only a Concave Lens. Optical glass large optics double concave lens material: Optical Glass Lens Diameter: 100mm Edge Thickness:10mm Focal Length: -300mm Package : only a Concave Lens.

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Sciencent Double Concave Optical Lense 20 cm Focal Length, 75mm Dia

Sciencent High Quality Glass Lens. Sciencent High Quality Double Concave lens. 75mm Diameter. 20cm focal Length. 75mm diameter, 20cm Focal Length Double Concave Lnes.


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1 Single Lens - Eisco Labs Double Concave Glass Lens 75mm diameter, 50 cm Focal Length

Double Concave Glass Lens. Focal length 50 cm. Double Concave Lnes. 75mm Diameter. Diameter 75 mm. 20cm focal Length. Highly polished glass with ground edges. 1 single Lens. Sciencent High Quality Glass Lens.


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Lambda Solid Brass, Ruby Tipped Spinning Top

Focal length 50 cm. This also means i went from 2 manual machining operations on the two-piece top, to 5 manual operations on the solid top. As seen on Kickstarter. Is it worth it? Totally. This variant of the Lambda top is machined from a single piece of solid brass bar stock. Double Concave Glass Lens. The original top with a ruby ball now replaceable.

75mm Diameter. Hundreds of hours have been dedicated to design and testing to bring you the world's most high performance top. Accept no substitutes. 20cm focal Length. The lambda was the first spinning top to feature an instrument ruby contact point and many imitators followed. Sciencent High Quality Glass Lens.

Does that make the lambda Solid an even more unpleasant slog of boring, repetitive manual labor? Yep. Made in USA. World's highest precision spinning top. This consumes 4x the amount of brass compared to the two-piece tops, but it also delivers a more perfect spin. Diameter 75 mm. Any machinist will tell you that the most accurate part is the one machined to completion without removing it from the machine.




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Spins Forever up to 4:51 minutes, Self-Balancing, Precision Machined Stainless Metal. This Fidget Gyroscope is a Unique Gift For Men / Adults. Desk Toy Spin Top Toy - EDC Keychain Spinning Top

Just take the spinning top out of your keychain and spin :-suitable for both adults and cHILDRENIf you are an adult, you can play whenever you want, ready to show off to your colleagues at work, having your fun gadget always at hand, in the office or when traveling. If you have kids, they will love ♥ that they can take the spinning top everywhere easily, ready to show it off to all their friends.

3 things that make this spinning top stand out portability - Since it is keychain portable, small, and lightweight, it is perfect for everyday carry on your keys or in your pocket. Self-balancing - you do not need to be an expert to spin this top like with some other models. Original gift for men and boys ➡ you can now stop thinking about the next birthday gift for him because you just found a winner! A unique gag gift that he will actually use and enjoy every day!

If you beat that and provide a video proof we'll refund $25. Exchange all idle, boring moments for play and joyhow many idle moments do you have in life when there is simply nothing to do? Especially while waiting somewhere or for something. Limited Lifetime Warranty. Even you if spin it in a crooked position, it will gradually center itself into perfect verticality.

Long-lasting spin - You will be amazed how long this spinning top can keep spinning. If you beat that and post a video review and let us know, we will refund you $10 usd! it will serve you for manY YEARS OR EVEN YOUR WHOLE LIFESince this toy is made from quality stainless steel #303, it will serve you for many years or even your whole life.




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FidJoy Precision Stainless Steel Spinning Top , Get the Longest Spin with the Classic Fidget Spinner For the Desk, Pocket or Gift. 2.7 CM Height, 2 CM Width

Self-balancing and quiet. Get a real long and quiet spin with this top. Precision top can be used as distraction during those tense moments at the office or at home, anxiety, ADD, as a challenge with friends and great conversation starter. Comes in a fabric carry pouch which is great for storage and packaged in the exclusive Fidjoy box, makes for a perfect gift with a super presentation.

Solidly made of stainless steel and well balanced, this will fit your pocket for carry around use. Diameter 75 mm. Sciencent High Quality Glass Lens. Fun and therapeutic at the same time which can perfect your fine motor skills. This fits it to your pocket to take with you wherever you go. Average spin is 2-3 minutes.

You can finally use your fingers for something other than the latest tech gadgets. What to expectthis solid stainless steel solid designed top is perfect for precision. This has the weight evenly distributed to make the perfect fidget toy. Double Concave Glass Lens. Top quality ➡ made from 1 piece of stainless steel #303 metal by precise machining.

It weighs 21 Grams.


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Eisco Labs Double Concave Glass Lens, 75mm Diameter, 30cm Focal Length

Average spin is 2-3 minutes. Sciencent High Quality Glass Lens. Precision top can be used as distraction during those tense moments at the office or at home, ADD, anxiety, as a challenge with friends and great conversation starter. Comes in a fabric carry pouch which is great for storage and packaged in the exclusive Fidjoy box, makes for a perfect gift with a super presentation.

Solidly made of stainless steel and well balanced, this will fit your pocket for carry around use. Double Concave Glass Lens. Double Concave. Get a real long and quiet spin with this top. Diameter = 75mm. Made in USA. Top quality ➡ made from 1 piece of stainless steel #303 metal by precise machining. Focal length 50 cm.

When you go out with friends, you will all try to beat each other's records. Original gift for men and boys ➡ you can now stop thinking about the next birthday gift for him because you just found a winner! A unique gag gift that he will actually use and enjoy every day! If you beat that and provide a video proof we'll refund $25.

Works as a conversation starter and distraction for all settings. Very sturdy and durable.


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United Scientific LCV108 Glass Double Convex Lens, 100mm Diameter, 200mm Focal Length

If you beat that and provide a video proof we'll refund $25. Focal length = 30cm. Double Concave Lnes. 20cm focal Length. Double Concave Glass Lens. 2. 7 cm height and 2 CM Diameter 1. 08 inches Height and. 78 inches diameter. Average spin is 2-3 minutes. Sciencent High Quality Glass Lens. Double Concave. Top quality ➡ made from 1 piece of stainless steel #303 metal by precise machining.

Textured shaft provides a perfect grip to spin it easily & fast. Original gift for men and boys ➡ you can now stop thinking about the next birthday gift for him because you just found a winner! A unique gag gift that he will actually use and enjoy every day! Get a real long and quiet spin with this top.

75mm Diameter. Duration of spin can vary based on strength and surface. Use it to kill your idle time as a boredom breaker, fun, for distraction, and relief from stress. Beat 4:51 spinning time ➡ most customers achieve a spin. World's highest precision spinning top. Works as a conversation starter and distraction for all settings.

Self-balancing and quiet.


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Ajax Scientific Concave Mirror, 100mm Diameter, 250mm Focal Length

Ajax scientific distributes scientific equipment, and instruments for industrial, supplies, research, and educational applications. Concave lens works very well as a surface for this spinner. Great distractor for stress, adhd. Mirrors are used in scientific experiments and classroom demonstrations to explore optical principles and effects.

The original top with a ruby ball now replaceable. Use it to kill your idle time as a boredom breaker, for distraction, fun, and relief from stress. Beat 4:51 spinning time ➡ most customers achieve a spin. Works as a conversation starter and distraction for all settings. Highly polished glass with ground edges.

1 single Lens. Very sturdy and durable. As seen on Kickstarter. Science education projects include a broad range of activities, robotics, biology, aeronautics, energy, chemistry, such as practical experiments in engineering, physics, and geology. Get a real long and quiet spin with this top. Take it to a bar and see what happens next ➡ this little devil is an amazing conversation starter and contest trigger.

Diameter 75 mm.


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Toysmith Euler's Disk

Inward curving mirror forms an image of the reflected object that is upside down when past the focal point, and magnified and right-side up before the focal point. If you beat that and provide a video proof we'll refund $25. When you go out with friends, you will all try to beat each other's records. World's highest precision spinning top.

As seen on Kickstarter. Complete with instructions and the scientific answers! Double Concave Lnes. Works as a conversation starter and distraction for all settings. Original gift for men and boys ➡ you can now stop thinking about the next birthday gift for him because you just found a winner! A unique gag gift that he will actually use and enjoy every day!

Highly polished glass with ground edges. 1 single Lens. Never be bored again ➡ edc top is perfect for your everyday carry as a keychain fob or a pocket toy. Does it speed up? Listen to its rhythmic sounds. Includes euler's disk, 9" concave mirror base and nine pieces of magnetized holographic foil. Includes disk, 9" concave mirror base and 9 pieces of holographic foil.

Limited Lifetime Warranty. Made of glass.


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Glass Top Spinning Platform and Wooden Holder with Top Slots - Made in the USA

Focal length = 30cm. Highly polished glass with ground edges. 1 single Lens. Patented 3" diameter chrome-plated steel disk. Just give it a spin and gravity does the rest. When you go out with friends, you will all try to beat each other's records. Foil is magnetized. For best and longest results spin while applying downwards pressure on a glass leveled surface.

The original top with a ruby ball now replaceable. Average spin is 2-3 minutes. Weighs 21 grams. 74 ounces. Diameter = 75mm. 75mm Diameter. Limited Lifetime Warranty. 2. 7 cm height and 2 CM Diameter 1. 08 inches Height and. 78 inches diameter. Spin science into art. Double Concave Glass Lens. You can get this customized with up to 3 letters perfect for initials - Search for HBARSPIN01CUSTOM.

High quality polished double concave glass lens with ground edges is removable for cleaning purposes.


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