Amazon.com: 20 Pieces 70mm Wooden Rings, Natural Unfinished Solid Wooden Rings for Craft DIY, Jewelry Making
Nitrile Rubber O Ring 70mm OD 2.5mm Width Round Sealing Washer Sealing Gasket Ring Faucet O-Ring Black Pack of 50: Amazon.com: Tools & Home Improvement
Wiseco Piston Rings - 70mm Bore - 2756CD Dirt Bike Motorcycle Snowmobile - Dennis Kirk