This is an accessory to the Delta Dust Collector. It reduces 4" to 2-1/2". We engineered the inside diameter of the 2-1/2" side of each of these fittings to duplicate the 2-1/2" opening on your shop-vac. Insert the shop-vac brand hose to the vac and the other end to one of these fittings to power the dust collection system. The outside diameter matches our standard dust collection hose to function as regular reducers.
- Outer Diameter: 2-1/2" x 4"
- Overall Size: 4-1/2" L x 4-1/4" W x 4-1/4" D
- Weight: .15 lbs