From the Manufacturer
A versatile dust collection system that fits 2.5” and 4” dust collection systems
Specifically designed for the CNS Contractor Saw, this control panel is a versatile dust-collection accessory that fits 2-1/2" and 4" dust-collection systems. This is to be used in conjunction with the Overarm Dust Collection Assembly (#846909) and under the table dust-collection with a simple T Hose Fitting. Easy-to-use clamps make redirecting the internal tube a breeze.