Vacuum Cups and Suction Cups For the Packaging Industry SUB38NR Cup No. and Material D Dia. in. (mm) d Dia. in. (mm) H height in. (mm) h height in. (mm) Bottom Surface Material Item Weight oz. (grams) SUB38NR (Natural Rubber) 1.50 (38) 0.63 (16) 1.46 (37) 0.79 (20) Smooth Natural Rubber 0.441 (12.5)