The O-RING list is commonly available in the market with an inside diameter more than 450mm. According to our experences and rubber molding design, various O-Ring sizes can be customized. The largest inside diameter we have ever made is 5500mm. Cross Section you can choose from 2.62 to 20mm, etc. O-RING size can be flexibly adjusted. The minimum order quantity (MOQ) is 1PC. It can save the high O-RING molding costs, and at the same time, the production can be done more efficiently and faster.