POWERTEC 70141 2-1/2-Inch to 2-1/4-Inch Reducer Connect 2-1/4-Inch opening ducts or accessories to 2-1/2-Inch flexible 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 2-29/64-Inch O.D. and 2-7/32-Inch I.D. 2-1/4-Inch nominal end measures 2-7/32-Inch tapered O.D. and 2-Inch I.D.