Review on 🔧 Camco Olympian Aluminum Stack Jacks - Stabilize, Level, and Position RVs, Trailers, and Campers - Up to 6,000 lbs Capacity - 17" Extension - 4 Pack (Model 44560) by Kevin Overturf

They're great for the price and I love how little space they take up, but you have to know that they're small and only very stable when they're up of the lowest height are used. Consider that they only reach 11-13 inches and the rest of your space will need to be filled with wood blocks or bricks to be stable. Even extended a few centimeters higher, they have a lot of play and your motorhome will still wobble. Not as much as using wheels and shocks, but enough to be an issue. Bigger, wider, and better jack legs aren't as restrictive, and even adjusting an inch or two is better than trying to use wooden blocks entirely, but you'll be disappointed and dissatisfied if you don't know the limits.