45X4 Oring 45mm ID X 4mm CS NBR Nitrile Acrylonitrile Butadiene ShA 70 Green O ring O ring Sealing Rubber|seal rubber|o ring o-ringo-ring seal - AliExpress
47.45X4 Oring 47.45mm ID X 4mm CS NBR Nitrile Acrylonitrile Butadiene ShA 70 Black O ring O ring Sealing Rubber|seal single|seal rubber productsrubber oring - AliExpress
O-rings EPDM
20pcs 45x4 45*4 46x4 46*4 48x4 48*4 50x4 50*4 (OD*Thickness) 4MM Thickness Food Grade Red Silicone Oil Seal O Ring O Ring Gasket|o-ring gasket|o ring o-ringo ring gasket - AliExpress
45mm x 4mm (53mm OD) Nitrile O-Rings | Totally Seals®
Metric Black Rubber O Rings - 3mm To 45mm Interior Dia. & 2mm To 4mm Thickness | eBay
Home Improvement 53mm OD 45x4 Nitrile O-rings 45mm Inner Diameter x 4mm Cross Section Plumbing & Fixtures