For more information, please contact customer service 4T-LM503349/LM503310 Chrome Steel GCr15 Taper Roller Bearing LM503349/10 SET319 Truck Wheel Bearing 45.98x74.97x21.4mm 4T-LM503349/LM503310 is a high-load inch-series taper roller bearing with 4T-grade enhanced load capacity. It adopts a separable inner ring-roller assembly design, excels at bearing heavy radial loads and unidirectional heavy axial loads, and ensures stable rotation under high-pressure working conditions