TRB RC 10pcs 5x10x3mm Precision High Speed Ball Bearing, Chrome Steel 52100 (GCr15) ABEC 3 with Hybrid Seals Blue.
Each Bearing Contains 1 Rubber Seal, 1 Metal Shield.
Part SKU# BLU-MR105-RZ/W3x10

Chrome Steel 52100 (GCr15) ABEC 3 Races
Hard Chrome Steel 52100 (GCr15) Balls
Hybrid Seal

Dimensions as follows: ID, OD, Width: 5x10x3mm