1. Product Overview 3204 B.2RS1 is a double-row integrated angular contact ball bearing with 40° large contact angle and double-sided 2RS1 lip contact seals. Its built-in back-to-back ball layout combines two single-row bearings into one compact unit, capable of bearing heavy radial loads plus strong bidirectional axial loads and anti-tilting moments. Factory pre-filled with high-performance grease and fully sealed, it fits dusty working environments such as packaging