50 1/8" I.D. 1/4" O.D. 1/16" Thick BUNA-N Rubber O-Ring: O Ring Seals: Amazon.com: Industrial & Scientific
Amazon.com: JWBIZ 30 Pcs Metal O Rings Heavy-Duty Extra Thick 3.8mm Thickness for Sewing Keychains Belts and Dog Leash (1 inch, Silver) : Arts, Crafts & Sewing
O-Ring Size Chart : The O-Ring Store LLC, We make getting O-Rings easy!
19.5mm ID x 23.5mm OD x 2mm thick O-ring. Buna-70. Quan 4. | eBay
15mm Rubber O-Rings (ID: 10mm) - choose color & quantity – Bead Me A Story