TRB RC 10pcs 8x16x5mm 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: 8x16x5mm Bearing is Compatible with Part #: Axial: AXA1225Arrma: AR610016ECX: ECX0920HPI: B085Kyosho: BRG005Mugen: MUGC0601Traxxas: 5118Team Associated: 25236 TRB RC M8x10mm Dia. Steel Shim Pack 10ea 0.1, 0.2, 0.3, 0.5mm Width / Thickness. Dimensions and Qty's: ID = 8mm OD = 10mm Width/Thickness = 10ea 0.1mm 10ea 0.2mm 10ea 0.3mm 10ea 0.5mm