Vacuum Cups and Suction CupsFor the Packaging Industry SUB39NR Cup No. and Material DDia. in. (mm) dDia. in. (mm) Hheight in. (mm) hheight in. (mm) Bottom Surface Material SUB39NR (Natural Rubber) 1.54 (39) 0.63 (16) 1.89 (48) 0.79 (20) Smooth Natural Rubber