Check the listing for details. POWERTEC 4 Inch Angled Dust Port Fitting Adapter (70153). Condition: New. Listed at 10.51 USD. Designed to attach easily and securely to machinesPredrilled slots make for easy and solid port installationDesigned for durability and made to withstand the wear and tear The POWERTEC Angled Dust Port features a versatile curved port design that attaches easily and tightly to machine's chip chute with 4" openings, such as jointers, band saws, router tables, etc. Pre-drilled mounting holes allow for simple and secure installation. Keeps your dust collection system operating effectively and efficiently with this handy accessory.Designed to attach easily and securely to machine's chip chute for connecting to dust collection systemsPre-drilled mounting holes for easy attachmentTough, durable ABS plastic materialFlange measures 7-1/2 in. by 4-1/4 in.4-Inch nominal end measures 3-61/64 in. O.D. and 3-5/8 in. I.D.