Thick, but very desirable, like a nice fat slice of salami, these negative meniscus glass lenses are 55mm dia with a focal length of -169mm (think: reduction). Great for artists and crafters. Edges might have some slight chips, but that's surplus for you.

These white microfiber cloths are larger, at 6" x 7-1/2",  and thicker than usual. Made for medical equipment (so you know the quality is excellent), they're dandy for eyeglasses, lenses, computer screens and other electronic equipment. White with a dark blue edge (with a small logo in one corner) they're actually attractive and could double as pocket squares. Bundled by the pair so you'll get (6) cloths in our Pkg(3), or try our super low 20-pair price.

These 9mm dia  plano-convex (PCx)glass lenses have an appx. 154mm focal length, and are perfect for arts and crafts projects, or for making the worlds tiniest telescope. May have a few small chips but we will sort them as best as we can. Call about larger quantity discounts!

Great little glass DCX lenses for all of your project needs.  Utilize their 48.3mm focal lengths for all classroom projects, or combine these with other lenses to build binoculars, magnifiers, microscopes and telescopes. These are seconds so may have small chips.

These standard-size 2” x 2” slides in tan plastic frames are polarized despite not having an opinion on anything. It’s the polarizing filter in the lens that makes them polarized. You’ll get (2) so you can do cool experiments to impress your friends or blow your own mind. Get all sciencey or creative, or however you get when you’re at your best.

Flat plastic Fresnel lens. This flexible magnifier is 7-1/4" x 10-1/4" and only about a millimeter thick. It is great when you need to scan a list, read a book, start a camp fire or just want to embiggen something. You can see most of the page without moving the magnifier which makes it great for reading. Only about 1.5 power, but that can make a huge visual difference. Nice piece at a very nice price.