1. Product Overview 4203BTNG N YRLN5 is double row angular contact ball bearing, standard dimension 17mm inner bore × 40mm outer diameter × 16mm total width.Suffix mark explanation: BTNG: Glass fiber reinforced polyamide cage, low friction, high temperature resistance, stable running at medium and high speed N: Outer ring with snap ring groove for axial positioning circlip installation YRLN5: Special clearance group with optimized internal play, suitable for equipment with