EISCO
Double Convex Lens, 250mm Focal Length, 1.5" (38mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great for Physics
DOUBLE CONVEX || Highly polished, double convex lens SPHERICAL || Lens measures 1.5" (38mm) in diameter is approximately 3mm thick 250MM FOCAL LENGTH || Converging lens with a 250mm focal length OPTICALLY WORKED GLASS || Made of high quality, optically worked glass. Highly polished with ground edges...
$9.99