Introducing the 3-Way Dust Collection Junction Fitting by POWERTEC. This y-shaped coupler allows you to connect 3 machines at once to one dust collection main branch or portable system. It essentially increases the amount of dust collection tools connected to one main line, helping you to maximize your workshop space, while optimizing your efficient workflow. For convenience, all (3) inlet ports and (1) inlet port accept most 4 in. ID dust collection hoses and flexible tubes to be utilized with your tools and machines. To connect directly to 4 in. OD machine ports, a flex cuff or other type union will be required. Works for an assortment of dust making tools and accessories, including Drum, Disk & Belt Sanders Jointers & Planers Table Saw Bandsaw more! Easy to Use Design Attach your machine(s) to any of the 3 inlet ports and then attach your dust collector to the outlet port. This 3-way adapter is made with premium ABS plastic, offering high impact and scratch resistance, along with long-term durability for your woodworking and dust collection needs. //Please Note//: For a direct machine attachment, you may need a blast gate and/or clamp (neither are included) to maintain connection and optimal suction power. Dimension Specifications All (4) ends possess a 3.25 in. inner diameter and a 4 in. outer diameter.