TRB RC 10pcs 5x11x4mm Precision High Speed Ball Bearing, Chrome Steel 52100 (GCr15) ABEC 3 with Blue Rubber Seals. Chrome Steel 52100 (GCr15) ABEC 3 Races Hard Chrome Steel 52100 (GCr15) BallsRubber Seals to Help Fight Dirt Great Quality & Value For Applications Dimensions as follows: ID, OD, Width: 5x11x4mmBearing is Compatible with Part #:Axial: AXA1221Arrma: AR610019Losi: LOSA6947HPI: B022Tamiya: 58041, 58354, 58056Traxxas: 4611, 5116Team Associated: 25239, 25618 TRB RC M5x7mm Dia. Steel Shim Pack 10ea 0.1, 0.2, 0.3, 0.5mm Width / Thickness. Dimensions and Qty's: ID = 5mm OD = 7mm Width/Thickness = 10ea 0.1mm 10ea 0.2mm 10ea 0.3mm 10ea 0.5mm