HiWay Round 11.5" Permanent RV Jack Pads (4-pack)Beef up your RVing system with SnapPad HiWay Bus 4 Pack tailor made for jacks measuring 11. 5 round, as found on some of the biggest Class A motorhomes. Have the confidence of knowing you're giving your rig only the best in stability, style, and convenience. For 11. 5 round jack feet 13. 75 total width 8. 4 lbs per pad Adds ~1 of thickness to jack foot Adds 53% surface area Shake tested to 50Gs Temperature tested to 120 and 40 degrees F