Sorry... another wheel chock question

Harbor Freight has a variety of sizes of rubber chocks, so you can get the size that you want. I have found I like them better than the plastic ones, because I have seen the plastic ones slip, especially on gravel or concrete pad. I use the X chocks for stability... it helps with the bounce from walking around inside, especially when my mom who has replacement knees and walks a bit heavy is with me. If I am just staying in trailer for a single night, I usually don't bother with X chocks, but always use the rubber ones..

I also use the Andersen Levelers with their chocks.. makes leveling easy and I am a bit more confident in those than the cheap yellow plastic chocks..