Vacuum Cups and Suction CupsFor the Packaging Industry SUB38NR Cup No. and Material DDia. in. (mm) dDia. in. (mm) Hheight in. (mm) hheight in. (mm) Bottom Surface Material SUB38NR (Natural Rubber) 1.50 (38) 0.63 (16) 1.46 (37) 0.79 (20) Smooth Natural Rubber