Introducing the 4 in. Aluminum Blast Gate for Dust Collector/Vacuum Fittings by POWERTECThis must-have Blast Gate helps maximize your dust collector system by regulating proper air flow to your designated machine of choice. Open and closed, it acts as an in-line gate to control the vacuum flow to specified areas of your work shop. Additionally, this aluminum blast gate works seamlessly with properly sized plastic and metal ducts, flexible hoses and 4 in. ports for an assortment of popular brands. Introducing the 4 in. Key Hose Clamps by POWERTECCommonly used to connect hoses to dust hoods, blast gates, connectors and other fittings. The blue key (knob) is designed to make the securing and un-fastening of the hose much easier, by hand and without the use of any tools. The clamps have an integral bridge component that steps over the tubing's helical reinforcement, delivering a direct transfer of force to the connection, which helps eliminate hose detachment and pressure loss from leakage. The 4 in. x 20 ft. PVC Dust Collector Hose - POWERTEC 70143A practical, safe and cost effective dust collection hose designed to enhance your existing workshop dust collection and filtration systems. This PVC Dust Collector Hose will not collapse under pressure from your dust collector and easy installation make it ideal for workshop dust control, sawdust collection, carpentry and woodworking applications.