Berchtold Operon Surgical Pads Integra-Gel Series: Gel Surgical Pads for Berchtold Operon OR Tables. Designed with ultimate patient comfort in mind. Recommended for high risk and heavy weight patients. 3” thick overall. Constructed of medium firm high density comfort foam, a layer of anti-sheer Pro-Tek Memory foam, and a top layer of visco polymer Gel, covered with 4-way stretch ultra soft vinyl. Fits Berchtold Operon D8500 Surgical Table.