BearingsBEARINGS DETAILSize: Inner (d): 8 mmOuter (D): 22 mmWidth (B): 7 mmWeight: 10.85 gMaterial: 52100 Chrome SteelLubrication: Pre-fill GreaseSeal: With 2 VV SealedGrade: ABEC-9Qty: 1 Set = 10 Pcs