Double Concave Lens, 100mm Focal Length, 3" (75mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great for Physics Classrooms - Eisco Labs hidden dries quickly

dries quickly

the nichrome wire diameter is 21 gauge/ 0

crystal clear glass can magnify patterns and designs while placing them on top of paper or fabric

Cut or score paper by pressing on the square blade carriage and sliding it up and down along the clear bar

Double Concave Lens, 100mm Focal Length, 3" (75mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great for Physics Classrooms - Eisco Labs hidden dries quicklyDouble Concave Lens, 100mm 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 100MM FOCAL LENGTH Diverging lens with a 100mm focal length OPTICALLY WORKED GLASS Made of high quality, optically worked glass. Highly polished with ground edges GREAT FOR