Reducing Glass Lens

Optical Glass Lens, Double Concave, 75mm Diameter, 20cm Focal Length(1) LensThis is a high quality, optically true lens.

Attention: Glass is fragile, do not drop on the floor. Features: Diameter: 100 mm. (3.93 in) Thickness: 10 mm. (0.39 in) Weight: 185 g. (0.4 lb) Material: K9 glass. Focal length: -300 mm. (-11.8 in) Package content: 1* Spinning Top Base

Forever Spin tops are Made in Canada, and CNC-machined from a solid piece of metal for precision, quality and durability. Every spinning top is meticulously checked to ensure that only perfectly balanced tops receive a serial number and carry the Forever Spin seal. We have taken the world's oldest t... [Read More]

This top spinning platform has dual purpose, spinning top holder and spinning base with high quality optical glass double concave lens. The spinning lens is 4mm (0.157") thick at the edges with a diameter of 75mm (2.95"). The glass lens seats just below the surface of the holder to give the spinning... [Read More]

Round double concave Optical Glass Lens designed for physics and educational uses.

Protect Your Eyes Digital screens release a form of invisible blue light.Blue Light is desirable to device manufacturers because of its efficiency and power. Cyxus can effectively block harmful blue light, which can lead to digital eye fatigue and eye strain. Great for alleviating visual fatigue an... [Read More]

Our eyes are the window to the world. Every day, we endlessly view and process information: working 9 to 5 in front of a computer screen, scrolling through our phones, catching up with our favorite show on TV, reading on a tablet, or battling it out on gaming devices. What do all of these digital d... [Read More]

Look good and see better with Gamma Ray Optics. Your GAMMA RAY OPTICS sunglasses come with a 90-Day Money Back Guarantee and Lifetime Warranty. With the collection that started it all, our original Gamma Ray TR90 Amber Orange xBlue series is a popular and neutral solution for protection against the ... [Read More]

Cyxus blue light blocking glasses can cut the harmful blue light from computer, smart phone, pad, TV, LED light. It also provide 100% UV protection. Relieving digital eye strain, dry and headaches. Protect your eyes, prevent from eye

Resin frameComposite lensnon-polarizedLens width: 2.24 inches【BLUE LIGHT BLOCKING LENS】blue blocking lens is made of first-class materials, which has the characteristics of super lightness, abrasion resistance, low friction coefficient and so on. Provide 100% UV400 protection, filter harmful blue light, suitable for watching TV, watching computer or mobile phone screen.【PROTECT YOUR EYES】Blue light glasses can cut 95% of the blue light, Eliminate glare and reduce visual fatigue and discomfort, Relieving eye fatigue, dry, vision falling, ophthalmic acid, bulging and headache, Filtering high-energy blue light allows you to focus on your game or mission.【INNOVATIVE DESIGN】Frame—TR90; Lens－Polycarbonate, we use Germany Bayer material, super

Resin frameComposite lensnon-polarizedLens width: 2.24 inches【BLUE LIGHT BLOCKING LENS】blue blocking lens is made of first-class materials, which has the characteristics of super lightness, abrasion resistance, low friction coefficient and so on. Provide 100% UV400 protection, filter harmful blue light, suitable for watching TV, watching computer or mobile phone screen.【PROTECT YOUR EYES】Blue light glasses can cut 95% of the blue light, Eliminate glare and reduce visual fatigue and discomfort, Relieving eye fatigue, dry, vision falling, ophthalmic acid, bulging and headache, Filtering high-energy blue light allows you to focus on your game or mission.【INNOVATIVE DESIGN】Frame—TR90; Lens－Polycarbonate, we use Germany Bayer material, super