CS 2.4mm OD 6~200mm Black NBR O Ring Seal Gasket Nitrile Butadiene Rubber Spacer Oil Resistance Washer Round Shape - AliExpress Home Improvement
193mm ID x 200mm OD x 3.5mm VMQ Silicone O-Ring 5 Pcs – Gavantools
Ideal Vacuum | One Sided Centering Ring Assembly, NW-200 Vacuum Fittings, Stainless Steel with Viton® O-Ring ISO-02-124
Ideal Vacuum | ISO 200 Centering Ring Stainless Steel with Viton O-Ring No Spacer, NW-200 Vacuum Flange Size, Typically Used with 8 Inch O.D. (203.2 mm) Tubing
NBR O-ring 170 x 2mm (OD 174mm) 70 Shore A [5 Pieces] | Tameson.com