Milwaukee Twins Front / Rear Caliper Seal Kit For Harley Milwaukee Twins Motorcycle Brake Caliper Seal Kit is finest quality seal that is compatible with DOT 3, DOT 4 and DOT 5 fluids. Kit includes the replacement seal and the replacement dust boot. Features: Includes dust boot and seal Compatible with DOT 3, DOT 4 and DOT 5 fluids One kit per caliper is needed Replaces OEM 44133-72 / 44127-72 A