Cool White LED Ring Light PCB - 70mm Diameter - 5V Power : ID 5138 : $8.50 : Adafruit Industries, Unique & fun DIY electronics and kits
Hub Centric Ring O.D 73mm I.D. 58.5mm
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
3 Pcs 70mm Book Hoops Binding Rings Scrapbook Album DIY Binder Loose Leaf Ring - Walmart.com
2pcs 2'7/8 Inch Extra Large O-rings 70mm ID / Extra Large - Etsy
Bochem™ Retort Ring Length: 70mm Stands and Rings | Fisher Scientific
2mm X 70mm (NBR) Buna-N 70 Duro Metric O-Ring [N2.00X070] : The O-Ring Store LLC, We make getting O-Rings easy!
Isotta 70mm Extension Ring B120
NBR O-ring 61 x 4.5mm (OD 70mm) 70 Shore A [10 Pieces] | Tameson.com