Editorial Review TRB RC 10pcs 5x13x4mm Precision High Speed Ball Bearing, Chrome Steel 52100 (GCr15) ABEC 5 with Hybrid Seals, Each Bearing Contains 1 Low Contact Rubber Seal, 1 No Contact Metal Shield. Part SKU# TRB-695-RZx10 ABEC 5 Precision Chromium Steel Races Hard Chrome Steel 52100 (GCr15) Balls Rubber Seal to Face Dirt Side Dimensions as follows: ID, OD, Thickness: 5x13x4mm This Bearing Can be Used to Replace Part #: Losi: LOSA6955 HPI: B018