That's a good question and the difference between the two SnapPad Jack Stand Pads for Motorhome are different shapes and depths, it isn't solely the notch in the center. I added photos of the two pads side-by-side so you can see the differences right next to each other. The correct pad will depend on the shape of your motorhome jack's feet:
- 10" Round Jack Feet: SnapPad EQ Compact Jack Pads - 10" Round Jack Feet # SP64FR4
- 10" Octagon-Shaped or 10" Round Concave Jack Feet: SnapPad... view full answer...