Finish: Matte Black Sinktop Air Switch Button, Available Six Finishes.Work: Air Switch Set Fit in Any Food Waste Disposer , Even Dishwasher.Feature: Air Switch Set Button Cover is Made of High Quality Brass. There is A Drainage Hole on The Side of The Air Switch Button. Waterproof, Anti-leakage.Digital: 3.15"x 2.40"x 1.95" Power Module, 60.0" Air Tube, 3.60"x 1.80" Air Switch Adapter Button, 1-1/4"Countertop Hole, 2HP, UL Certification.Install: Air Activated Button Can be Easily Installed on Sink Top or Counter Top by Island Installation. Two Gaskets Provide Stable Installation, do not need Screw Mounting.