Standard form lenses are mounted in moulded ABS rims having the power printed at two different places for easy identification. The rims are colour coded and you can either have the Cylindrical lenses with or without handles. Composition: Spheres 32 pairs each of Plus and Minus Cylinders 20 pairs each of Plus and Minus Prism 6 Pcs. Accs. 6 Pcs. Trial Set "PN" is supplied with the lenses fitted in wooden tray and flat top Wooden Carrying Case.