Air Bearings 10Pcs SR3ZZ 4.762x12.7x4.978 Mm Stainless Steel Bearings Item: SR3ZZ Structure: Deep Groove Material: Stainless Steel Bore Dia (d): 4.762 mm Outer Dia (D): 12.7 mm Width (B): 4..978 mm Material : Stainless steel Model Number : SR3ZZ