28X2 Oring 28mm ID X 2mm CS EPDM Ethylene Propylene FKM FPM Fluorocarbon HNBR Hydrogenated Nitrile O ring O ring Sealing Rubber|Seals| - AliExpress
12pcs 28x2.65 28*2.65 29x2.65 29*2.65 30x2.65 30*2.65 ID*Thickness Green Fluoro FKM Fluorine Rubber O Ring O Ring Sealing Gasket|sealing gaskets|rubber o ringo ring o-ring - AliExpress
28X2.5 Oring 28mm ID X 2.5mm CS HNBR Hydrogenated Nitrile ShA 75 Green O ring O ring Sealing Rubber|rubber lip seals|rubber gaskets and sealsseal hp - AliExpress