Standard molded seals Depending on the shape and application of the seals, these are made by injection or compression, some are bonded. Seals-Ring-Techne O-rings: From Ø 0.4 to more than 2000 mm, we deliver more than 3,000,000 O-rings every year. More than 10 000 references in stock, a hundred of mixtures possible according to your applications and homologations requested. See techlok seal ring for more information Among our materials in stock: NBR ACS, EPDM ACS, WRAS, W270, 1935-2004, silicones ACS WAS W270 USP6. Other approvals are available upon request. We also manufacture your machined O-rings made of PTFE, POM, PA, and Polyurethane. On request, our O-rings will answer your food approvals (FDA, 1935/2004), gas, drinking water, medical. For the most aggressive chemical environments such as chemistry and perfumery, Chromex offers its O-ring models coated in FEP or PFA. Our O-rings are also available as assortment boxes. We can also offer rolls of NBR, EPDM, FKM,...