exptsitltd-1-6-3-c-o-m "O"Rings FDA and USP Class VI Compliant Components are used in processing pipeline systems for the food, dairy, beverage, pharmaceutical and bio tech industries. The products are manufactured from EPDM, Viton and Silicone. All compounds are FDA and USP Class VI compliant. OUR O-RINGS INCLUDE: Nitrile / NBR HNBR Fluorocarbon/Viton/FKM FFKM / Kalrez� EPDM Silicone Fluorosilicone Need a Quote? Give us some project details, and we will promptly respond with either a quote or some follow-up questions to help us provide an accurate quote.