Proco inventories sizes ranging from 1" to 72" in diameter and materials such as: Chlorobutyl, EPDM, Neoprene, Nitrile and Hypalon. Proco carries a ready inventory of molded PFA and food grade expansion joints. Proco Products, Inc. 2431 N. Wigwam Dr. (95205), P.O. Box 590 Stockton, CA, 95201-0590