Ball Bearing Bore Size 8mm 8mm Id 20mm Od Ball Bearing Shaft 8mm Bearing Bearing Housing 8mm Ball Needle Bearing 3.5 Mm X10 8mm Ball 8mm Id X 12mm Od Needle Bearing 6000 Deep Groove Ball Bearing 10*26*8mm 22mm X 7mm X 8mm Sealed Ball Bearing 8mm Flanged Ball Bearing 8*16*5mm Flange Bearing F688zz Linear Bearing Shaft 8mm