HOMOCONO Optical Lens Double Concave Glass 10cm Diameter 300mm Focal Length Beveled Edges Easy to Clean Replacement
JEWEDECO Double Concave Glass Lens for Science Education, 300Mm Focal Length Optical Glass Lens 10Cm Diameter, Bevelled Grounded Edges
TGDGFKIAS Glass Prism Optical Glass Lens, 1pc Double Concave Lens Optical Glass K9 Material Diameter 40mm Focal Length -100mm Prism Lens
TGDGFKIAS Glass Prism Optical Glass Lens, 1pc Double Concave Lens Optical Glass K9 Material Diameter 12mm Focal Length -19.3mm Prism Lens
CHILDWEET 6pcs Double Convex Glass Lens 42mm Diameter and 300mm Focal Length, Beveled Grounded Edges for Lab Use, for Arts and Crafts, Projection Lights and Photographic Equipment
TGDGFKIAS Glass Prism Optical Glass Lens, 2pcs Diameter 90mm Focal Length 240mm Optical Double Convex Lens Factory Custom Optical Glass Prism And Lens
