Amazon.com: Solid Metal Rings for Crafts 1.5 inch Small Metal O Rings 12 Pack 4mm Thick Heavy Duty 1 1/2 inch Welded O Rings Metal for Sewing,Dog Leash,Dog Collor,Macrame Plant Hanger Metal
50mm ID x 55mm OD x 2.5mm thick O-ring. Buna-70. Quan 1. | eBay