Double Concave Lens, 500mm Focal Length, 3" (75mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great for Physics Classrooms - Eisco Labs industrial_Oct2022 when moistened and combined with

when moistened and combined with Masterson's Acrylic Palette Film

Also a Great Metal Polish

Smart brightness control(the Light stays all night and turns brighter when it detects motion)

a hectic day or errands or anytime

High Concentration: A little resin color pigment goes a long way

Double Concave Lens, 500mm Focal Length, 3" (75mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great for Physics Classrooms - Eisco Labs industrial_Oct2022 when moistened and combined withDouble Concave Lens, 500mm Focal Length, 3" (75mm) Diameter Spherical, Optically Worked Glass Lens Ground Edges, Polished Great for Physics Classrooms Eisco Labs Product Features DOUBLE CONCAVE Highly polished, double concave lens SPHERICAL Lens measures 3" (75mm) in diameter 500MM FOCAL LENGTH Diverging lens with a 500mm focal length OPTICALLY WORKED GLASS Made of high quality, optically worked glass. Highly polished with ground edges GREAT FOR