Remember when you had a clean workshop? Split the power of your dust collector between two woodworking machines with the WEN 4-Inch T-Fitting Dust Hose Splitter. This useful adapter installs easily, splitting a standard 4-inch dust collection port out into two. The durable ABS plastic construction provides maximum efficiency to your dust collection system when properly connected. Each 4-inch connection side measures in at 94mm inner diameter and 100mm outer diameter. Compatible with WEN dust hose models 28200 and 28221. Remember when you had maximum suction? Remember WEN.