Amazon.com: TINGCHAO PTFE Flat Washers 426mm OD 490mm ID 3mm Thick O-Ring Gasket White for Laboratory Industrial and Machinery Applications 1pcs,630 * 695 * 3mm : Industrial & Scientific
KREMLIN® 129.529.903 Compatible O-Ring Teflon For Tip (Non-OEM)
Amazon.com: TINGCHAO PTFE Flat Gasket White O-Ring Sealing Washers for Laboratory and Industrial Applications (5 pcs),158 * 108mm : Industrial & Scientific
Sterling Seal ORTFE377x10 Number-377 Standard Teflon O-Ring, Outstanding Weather Resistance, Polytetrafluoro-Ethylene, 10" ID, 10-3/8" OD (Pack of 10): Amazon.com: Industrial & Scientific
Sterling Seal ORTFE310x25 Number-310 Standard Teflon O-Ring, Outstanding Weather Resistance, Polytetrafluoro-Ethylene, 1/2" ID, 7/8" OD (Pack of 25): Amazon.com: Industrial & Scientific
Ochoos 100 x PTFE Flache Teflon-Unterlegscheibe, Abstandshalter, Dichtung, OD 13, 13,8 14, 14,5 15, 16, 16,5 20 x 10 x 0,2/0,3/0,5/0,6/0,7/0,8/1 mm, ID 10 mm, OD 16mm / White / 0.2mm / 10mm : Amazon.de: Baumarkt