OUTSTANDING!I ordered this heavy-duty replacement air switch mainly because the original model's width was slightly too large to fit inside the hole. Our island sink is more of a "bar size", so the holes are not the standard 1 3/4" diameter for a kitchen sink. The holes I have are more of a bathroom size, which is slightly smaller.This piece fit like a charm, and should have no problem fitting in either a kitchen sink or bathroom / bar sink (the ring where the button is should cover both hole sizes). What I wasn't expecting was the *QUALITY* of the button on this thing! It is super top heavy, and weights about 2x-3x the weight of the "chrome colored metal" air switch fixture I previously had (yes - the difference is that noticeable).There is no doubt this piece is solid brass, and the chrome perfectly matches the other fixtures. It comes with a gasket to prevent water from seeping under the switch and into the cabinet. Another thing I really liked is the way the pressing of the switch feels. There is a nice feeling of heft & resistance while pushing the button. The other buttons I've tried (including InSinkerator's) feel a little cheaper and too easy to push.The pre-existing air tubing fits perfectly. I can either press quickly or slow. Either way, the garbage disposal turns on & off with ease. I couldn't be happier, and while I originally wasn't planning on purchasing a redundant secondary air switch column in hindsight I would do this again in a heartbeat even if the original one fit! Excellent job, Westbrass. I will certainly look into other fixtures you offer.