LENSES SET OF 6 CONCAVE/CONVEX
Set of six 38mm diameter glass lenses: plano-concave, plano-convex, double-concave, double-convex, convexo-concave, concavo-convex.
Rutland Industries
Set of six 38mm diameter glass lenses: plano-concave, plano-convex, double-concave, double-convex, convexo-concave, concavo-convex.
