Most of the old Atwood propane or carbon monoxide detectors have been discontinued and sold out so options are pretty limited. Since I don't know the model of your detector or size of your cutout hole I can't say for certain that the RV Propane Gas Detector # RS64FR will cover the existing hole, but I can say that it comes with two trim pieces with the following dimensions to help cover the old cutout:
The long plate measures 7-1/4" wide, 3-3/8" tall and hole to hole measurements of 6"... view full answer...
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