44mm x 3mm (50mm OD) Nitrile O-Rings | Totally Seals®
Transparent Silicon O rings Seals Gasket 3.5mm Thickness 34/35/36/37/38/39/40/41/42/43/44mm OD Rubber O Ring Sealing Washer|sealing washer|sealing gasketsrubber o ring - AliExpress
Champion 44mm (I.D.) x 3.5mm Metric O-Ring -10pk - Auto Trail Ltd