Shimano XT BR-M755 Hydraulic Disc Brake Bleed Nipple Cap Description: The Shimano XT BR-M755 Hydraulic Disc Brake Bleed Nipple Cap is a factory replacement component that can be used to replace a damaged or missing part. This cap keeps the bleed nipple clean so it is easier to perform the bleeding process and ensure contaminates stay out of the internal workings of the brake system. Features: Cap for protecting a hydraulic disc brake caliper's bleed nipple Sold individually See compatibility tab for a list of compatible disc brake calipers