Dust Collector 5" to 4" Duct Reducer ABS Plastic w/ 4" OD & 5" OD Openings 73472
These reducers allow fitting of a 4" dust collection hose to a 5" hose. Overall length is 4.75". Has a flange to allow easy assemble/disassemble. One end has 4" OD opening and the other has 5" OD opening.