The POWERTEC 4-Inch to 3-Inch reducer designed to transition 4-Inch to 3-Inch diameters. It allows use of 3-Inch duct to 4-Inch hose. Made of tough, dural ABS plastic material. Simple to install, use and uninstall for the utmost in ease, performance and reliability.
. Connect 3-Inch opening duct to 4-Inch flexible hose
. Transition 3-Inch duct to 4-Inch standard hose
. Tough, durable ABS plastic material
. 4-Inch nominal end measures 3-15/16-Inch O.D. and 3-45/56-Inch I.D.
. 3-Inch nominal end measures 2-63/64-Inch O.D. and 2-23/32-Inch I.D.