POWERTEC 70138 2-1/2-Inch to 1-1/2-Inch Reducer Connect a 2-1/2-Inch hose or accessory to a 1-1/2-Inch hose Tough, durable ABS plastic material Adaptable to Shop-Vac, Sears and a variety of other wet/dry vacuum cleaners 2-1/2-Inch nominal end measures 2-15/32-Inch O.D. and 2-1/4-Inch I.D. 1-1/2-Inch nominal end measures 1-15/32-Inch O.D. and 1-1/4-Inch I.D.