... .: inner dia: 8mm, 10mm, 14mm, 15.8mm, 30.5mm Plastic O ringMaterial: PP, PC, POM, Nylonsize.: inner dia: 8mm, outer dia ... dia. 20mm, material: polycarbonate, color: clearinner dia. 15.8mm, outer: 22.5mm, material: PP, color: whiteinner dia. 30.5mm, outer 38 ... other colors, will produce according to customer's order. Plastic O Rings