High Quality J-Type Vacuum Sealing Ring - China Rubber O Ring and NBR O Ring
Material considerations for O-rings used in vacuum and clean-critical environments - UC Components, Inc.
Ideal Vacuum | ISO 100 One Sided Centering Ring Stainless Steel with Viton O -Ring, NW-100 Vacuum Flange Size, Typically Used with 4 Inch O.D. (101.6 mm) Tubing
O-Ring for S-Series Vacuum Pump
Vacuum Extractor O-Ring Seal - Gilson Co.
55561102] SAAB Vacuum Pump Internal O-Ring Seal (B207) - Saab Parts from eSaabParts.com