Used in models #R1500, R1505, R1510
These buttons tend to break way too often. But it is much cheaper at the moment for me other than replacing the full over-the-range microwave.
Not an MCM issue but a manufacturer issue.
Because this is on-sale I am getting two and the value is great since the sale price is 1/2 the cost of the original price. It would be nice of the MFGR would produce this part with stronger plastic or design it so that the start button doesn't break off as often as it does.
I have used MCM for many years and would give high recommendation for getting the job done right.