From the manufacturer: "The BAL C Series Jack Foot Pads are designed for use with C series standard or motorized stabilizing jacks. These Foot pads keeps your jacks from sinking into soft dirt or sand. Fits BAL model number: 23219, 23222, 23225, 23228, 23231.
Dimensions: 5-9/16" x 5-7/16"
Space between mounting tabs is 3 1/4"
Space from top of foot to mounting holes in tabs is 3/4"
Includes (2) Jack Pads, (2) bolts, (2) locking nuts"
My experience: I installed these on my 2017 2185 in May. I recommend bringing a hammer as some of the bolts required a little physical persuasion to install. Overall install for all four was about 25 minutes and was relatively simple. I purchased 2 (They come in sets of 2, so 4 total) on Amazon for $11.96 each. My wife would agree that our trailer does seem more stable while camping on ground other than concrete. Combine these with the x-chocks and my trailer is very stable and has almost no movement while unhitched. Easy install, inexpensive and adds to stability = a recommendation from me.
Note: I have heard that the pads for C jacks from Camping World will not install on Lances. I cannot verify this but wanted to issue a warning. If anyone can provide confirmation that would be great.
