The 2-1/2-Inch Dust Control Flex Cuff with Hose Clamps for Dust Collection Systems by POWERTEC. INCLUDES: (1) Flexible Hose Cuff Coupler with Dust Hose Clamps. This coupler is designed to provide you with an airtight connection between a pair of 2-1/2" dust collection fittings or hoses. And it comes equipped with standard hose clamps so that you won't need unattractive duct tape or a messy assortment of screws. It's a highly useful (and reusable) dust collection system accessory or dust collector accessory, as it allows you to interchange fittings and connect adapters to keep all of your dust collection tools connected.//Compatibility: These Flex Cuffs work exclusively with nominal 2-1/2" O.D. ports, hoses and fittings.//Construction: It's made with high quality rubber to ensure long-term durability and possesses a flexible profile capable of conforming to the narrow range of sized ports.//Our Customers Have: Connected 2-1/2" PVC pipe to 2-1/2" blast gate, Joined a table saw to a dust sheriff as a temporary solution, Connected a 2-1/2" table saw sawdust exit to a shop vac adapter, Used along with the POWERTEC 2-1/2" Reducer to connect a shop vac to planer.//【Dimensions of Rubber Connector Cuff: 2-57/64-Inch O.D. & 2-1/2-Inch I.D.】