Amazon.co.jp: Qiilu 6001-2RS Mini Bearings, Bearing Steel, Ball Bearings, Both Shields, Deep Groove Ball Bearings, Inner Diameter 0.5 inches (12 mm) x Outer Diameter 1.1 inches (28 mm) x Thickness 0.3 inches (
uxcell 6001-2RS Ball Bearing 12mm x 28mm x 8mm Double Sealed 180101 Deep Groove Bearings High Carbon Steel Z1 (Pack of 10) : Amazon.com.au: Home Improvement