This light weight adapter is for converting a 4" duct to (2) 3" ducts. Made from a proprietary composite material these ducts are intended to be uses in areas with low heat. (2) 3" OD and (1) 4" ID these ducts slide over any existing 4" OD tube and converts it to fit (2) 3" Hoses over the other ends. (DO NOT USE ON BRAKE SPINDLE DUCT)
