Donepart 1" ID x 2" OD Bearing Garage Door Torsion Spring Center Bearings Deep Groove Ball Bearings with Snap Ring, 2 Pcs: Amazon.com: Industrial & Scientific
NTN Bearing 6004 Single Row Deep Groove Radial Ball Bearing, Normal Clearance, Steel Cage, 20 mm Bore ID, 42 mm OD, 12 mm Width, Open: Amazon.com: Industrial & Scientific