Either one would work. It has to fit a 4” mast though. Don’t have a mech, and don’t plan on getting one.

Im looking for a signal base that fits a 4" mast. Im not picky on the brand, or style, I just want a base. If anyone has one they'd be willing to sell, or see one for sale, id appreciate it. Thanks

Ended up finding a solution. With my 3d printer, I can print a cover for it.

I recently got an RSI crossarm. It came without the junction box cover. I will be putting it up soon, so if anyone knows of either a cover for sale or a temporary fix id be very grateful! I'll try to attach a picture.