Boxed set of High Quality Acrylic Prisms, made from clear acrylic sheet, all sides polished.  The set consists of six prisms in a variety of shapes, and an activity guide. 

Shipping weight - 1.25 lb, Dimensions: 10" x 8" x 2". 

Contents:
Rectangular block, 75mm x 50mm x 15mm . . . . . . . . .1
Semi-circle, 90mm base x 15mm thick . . . . . . . . . . . . .1
Equilateral prism, 75mm sides, 15mm thick . . . . . . . . .1
Double convex lens, 90mm long, 23mm at center . . . ..1
Double concave lens, 90mm long, 10mm at center . .. .2