I use these in my 40ft Diesel Pusher RV Leveling System and they work as advertised. Pros: Supports my 40ft RV on wet ground. don't rot, at least I don't think they will in my lifetime. Cons: Heavy, although I don't think they're any heavier than the pressure treated 2x8 dock lumber I've used before, and they take up a lot less basement space when on the move. Insects and rot have infested my last wood.
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