Amazon.com: SUOFEILAIMU-MI CS4mm Silicone O Ring OD 47/48/49/50/51/52/53/54/ 55/56/57x4mm O-Ring VMQ Gasket Seal Thickness 50PCS White Red Rubber 4mm ORing (Size : OD47x4mm Red) : Industrial & Scientific
10pc/lot Rubber Ring Black Nbr Sealing O Ring Od52/55/60/62/65/70/75/80/85/90/95/100*2.5mm O-ring Seal Gaskets Oil Ring Washer - Gaskets - AliExpress
O-ring 55,56x3,53 NBR70
OMIX 18760.37 Speedometer O-Ring for 55-06 Jeep Vehicles | Quadratec
https://www.allworldmachinery.com/itemdetail/P-55
Amazon.com: YINGJUN CS2.5mm EPDM O Ring ID 52/53/55/56/57/58/60/62/63x2.5 mm O-Ring Gasket Seal Exhaust Mount Rubber Insulator Grommet 30PCS ORING Ring Gasket (Size : ID64x2.5mm) : Industrial & Scientific
USA Industrials - O-Ring: 55 mm ID x 61 mm OD, 3 mm Thick, Viton - 47406483 - MSC Industrial Supply
Silicone o-rings 55 durometer OD11-70mm Thick 3.1 1.9mm Seal Ring Sealing Gasket | eBay