Introducing 4 in. Dust Collection Hose 90° Elbow Connector with Blast Gate and Dust Control Flex Cuff Set by POWERTEC. 【4-Inch 90° Elbow Dust Hose Connector】 ✔This 4 in. elbow connector facilitates directional changes in your dust collector hose network to maximize the system efficiency and effectiveness. With its airtight friction grip, this durable connector will ensure that potent dust and debris is extracted sucked straight into your dust collector, and that clear, clean air is returned into your workshop environment. Make it perfect with POWERTEC fittings - streamlined, simple to use, versatile! 【4-Inch Dust Control Flex Cuff with Hose Clamps】 ✔This coupler is designed to provide you with an airtight connection between a pair of 4 in. 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, as it allows you to interchange fittings and connect adapters to keep all of your dust collection tools connected. 【4 in. ABS Plastic Blast Gate】 ✔This manual blast gate helps maximize your dust collection system by regulating proper air flow to your designated machine of choice. Acting as an in-line gate to control the vacuum flow to specified areas of your work shop, it's designed to work seamlessly with a variety of flexible hoses, ducts, and 4-inch ports for an assortment of popular brands.