POWERTEC 4 in. PVC Dust Collection Hose with 2 Key Hose Clamps and 4 in. to 2-1/2 in. Cone Reducer//PVC Dust Collection Hose with 2 Key Hose Clamps was designed to provide you with a high-quality hose and clamp combo - perfect for your workshop dust collection system. It features a clear (transparent) dust collection hose that allows you to monitor dust & debris separation and vapor & smoke filtration. The POWERTEC hose, made out of heavy-duty polyvinyl choloride is ideal for an assortment of sawdust collectors, indoor ventilation ducts and it's specifically designed to fit 4 in. dust collection systems. The POWERTEC key hose clamps offer the perfect fit, not only for the included dust collector hose, but for many of your indoor/outdoor at-home DIY woodworking applications.//Cone Reducer allows you to connect 4 in. port to a 2-1/2 in. hose or a 2-1/2 in. port to a 4 in. hose. The 2-1/2 in. opening also allows you to fit Shop-Vac and a variety of other wet/dry vacuum cleaners. Simple to install, use and uninstall for the utmost in ease, performance and reliability. Double the Features]: Twice the Versatility: The hose works with an assortment of industrial and centralized dust collection systems, while the key hose clamps fit perfectly over the 4 in. hose - providing tight and secure clamping action. Dual Protection: Offers chemical & heat resistance for workshop safety.