Duram produce and distribute 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 WRAS (BS6920), Kiwa (BRL K17504), NSF (ANSI 61), for the use in drinking water systems.