WoodRiver® Dust Connection™ Quick-Connect Reducer Dust Collection Fitting allows you to connect reverse helix 4" dust collection hose to nominal 5" ports found on dust collection fittings like tees, wyes and blast gates or common 5" OD machine ports. Molded 4-3/4" long fitting has a tapered 5" ID port on one side and 4" OD left-hand thread port on the other. Molded using ABS material to maintain shape and withstand woodshop environment. Features: Specifications: What's Included: