Bellmouth entries are designed to have smooth inlet radius and can be used to attach a round duct or flexhose to a flat surface, good for certain dust collection applications. Other sizes available from 14″-24″, please call for pricing, allow 7-10 working days. 20 gauge construction. Outside diameter is 1/16 less than even inch.
04BELL-22 is a shorter length more cost effective 4 inch Bellmouth.