This waterproof sealing ring gasket kit is compatible with Bafang BBS01, BBS02, and BBSHD mid motors. It includes the essential rubber seals for phase wire outlets and hall sensor plug connections. These gaskets must be replaced after any internal motor repair or controller replacement to ensure proper waterproofing. Made from durable weather-resistant rubber, they provide reliable protection against water, dust, and moisture ingress. Verify your motor model before ordering. Professional installation recommended.