Sterling Seal ORSIL214x25 Number-214 Standard Silicone O-Ring has Excellent Resistance to Oxygen, Ozone and Sunlight, Vinyl Methyl Silicone, 70 Durometer Hardness, 1" ID, 1-1/4" OD (Pack of 25): Amazon.com: Industrial & Scientific
Surface Roughness & Finish for Bearings and Seals - Hallite
Seal design | Viton seal | American High Performance Seals