4449xx
These prisms are of superior quality. Set of 16 includes 1/2, 1, 2, 4, 6, 8, 10, 15, 20, 25, 30, 35, 40, 45, and 50 diopter plus Red Lens. Each measures 37mm square. 4449 xx Prism Set of 16 (5 lbs).
4445xx
These prisms are of superior quality. Set of 22 includes 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 25, 30, 35, 40, 45, and 50 diopter plus Red Lens. Each measures 37 mm square.