Remember when you had a clean workshop? Direct the flow of air around your shop with the WEN 4-Inch Blast Gate. This useful adapter installs easily, helping guide your dust collection system to the woodworking machine of choice depending on if the gate is open or closed. This makes for the perfect solution for shops with multiple tools and a single dust collector. The durable ABS plastic construction provides maximum efficiency to your dust collection system when properly connected. Each side measures in at 58mm inner diameter and 63mm outer diameter with a slight taper for improved compatibility. Compatible with WEN dust hose models 28200 and 28221. Remember when you had maximum suction? Remember WEN.