Dust Hose Adaptor 4" to 2 1/2" Reducer

We engineered the inside diameter of the 2-1/2-inch side of this fitting to duplicate the 2-1/2-inch opening on your shop vacuum. Insert the shop vacuum hose directly to the 2-1/2-inch side of the fitting. The outside diameters match our standard dust collection hose to function as regular reducers.