BUSY-CORNER 382 Pieces FKM O Ring Kit, Fluorocarbon 75A, 30 Inch Sizes, Chemical Resistant and Oil Resistance O-Rings for Various Chemicals, Hydraulic, Cylinders, Plumbing (Yellow Box, Brown Orings): Amazon.com: Industrial & Scientific
4.5X1 Oring 4.5mm ID X 1mm CS FKM FPM Fluorocarbon NBR Nitrile VMQ Silicone PU Polyurethane O ring O-ring Sealing Rubber - AliExpress