Double Concave Lens, 50mm Focal Length, 2" (50mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great for Physics Classrooms - Eisco Labs home2022 Text Weight Paper · Like

Double Concave Lens, 50mm Focal Length, 2" (50mm) Diameter Spherical, Optically Worked Glass Lens Ground Edges, Polished Great for Physics Classrooms Eisco Labs home2022 Text Weight Paper · Like Text Weight Paper · Like pages of a book or regular copy paper · Can be folded without scoring · Very flexible and easy to manipulate · Prints in most home printers Medium Weight Cardstock · Like a standard greeting card · Should be scored before folding · Print in most home printers Heavyweight Cardstock · Like a heavy greeting card · Must be scored before folding · May not print in some home printers – testing recommended Read more nickel plated surface