If your 2020 Jayco Seneca has 2- 8" and 2- 10" round feet on the landing gear, you can use the SnapPad Jack Stand Pads - 8" Round and 10" Round Jack Feet # SP34FR64. If the feet are two different sizes (8" and 10"), these will work well for you.
We don't have a database that tells us what will fit on which coach, so you'll want to measure to confirm fits. If you measure a different size, a different shape or your feet are the same sizes, just let me know and I can see what other options... view full answer...