Big Horn 11269 2-1/2" x 1" stepped hose adapter is made of flexible rubber and adapts hose to portable or stationary power tools. These convenient universal adapters make connecting different diameter hoses and fittings easy. Outside diameter fits 1-1/4, 1-1/2, and 2-1/2-Inches. Inside diameter fits 1, 1-1/4, 1-1/2, and 2-Inches. Use with a hose clamps (not included) for best connection.