FR56
.060 Over
I had my first (2) Stebels mounted like that. They don't like water as they have steel diaphragms. Once they start to rust they stop working. Always covered them when washing but not real easy to do if you get caught in the rain.
Luckily I'm in So California and took the option to give up rain riding. On the rare need for a full soap and water bath I throw a plastic bag over it.