Powertec 70140 2-1/2&rdquo; to 1-1/4&rdquo; Hose Reducer Connect a 1-1/4-Inch accessory to 2-1/2-Inch ID Flexible Dust Collection Hose Tough, durable ABS plastic material Adaptable to Shop-Vac, Sears and a variety of other wet/dry vacuum hoses that have a nominal 2-1/4-Inch OD hose end 2-1/2-Inch nominal end measures 2-29/64-Inch (2.45-Inch) O.D. and 2-7/32-Inch (2.28-Inch) I.D. 1-1/4-Inch nominal end measures 1-3/16-Inch (1.19-Inch) O.D. and 1-1/64-Inch (1.02-Inch) I.D.