Duram produces a large variety of O-rings of different sizes and of different materials. Duram Rubber Products can deliver most of the standard ISO 3601-1 dimensions chart and many other sizes made to order.

Duram O-rings are made of NBR, EPDM, Viton, silicone, etc., and have standard approvals from WRc (England) as well as of Kiwa (Holland and the EEC), NSF (us), for the use in drinking water systems.