Danco 10-Pack 7/8-in x 1/16-in Rubber Faucet O-Ring in the Faucet O-Rings department at Lowes.com
FKM O-ring 10 x 1.5mm Minimum 10 pcs - OringsandMore
200pcs 3mm Thickness Silicon O Ring Gaskets 10/11/12/13/14/15/16/17/18/19/20mm OD Rubber O Rings Seals Washers Grommets|sealing washer|ring gasketo ring gasket - AliExpress