54X2.7 Oring 54mm ID X 2.7mm CS VMQ PVMQ SILICONE ShA 60 Translucent O ring O ring Sealing Rubber Z16|sealing machine for plastic|seal cupseal washer - AliExpress
sourcingmap O-Rings Nitrile Rubber, 54mm Inner Diameter, 58mm OD, 2mm Width, Round Seal Gasket(Pack of 10): Amazon.co.uk: DIY & Tools
54X2.5 Oring 54mm ID X 2.5mm CS EPDM Ethylene Propylene FKM FPM Fluorocarbon NBR Nitrile O ring O ring Sealing Rubber|Seals| - AliExpress