40pcs 6x2.5 6*2.5 7x2.5 7*2.5 8x2.5 8*2.5 (OD*THK) Green Fluoro FKM Fluorine Rubber O Ring Washer O Ring Oil Sealing Gasket|sealing gaskets|rubber o ringseal ring gasket - AliExpress
OR 3x1.5 / 5x2 / 4.9x2 / 6x2 Oring ID x CS PU90 ShA O Ring Seals/ Urethane Polyurethane O Ring Green|Gaskets| - AliExpress