The SnapPad BF 10 4-pack is compatible with a range of Class C Motorhomes and Fifth Wheel models that feature 10" Octagon shaped Bigfoot jacks. This includes some models by Jayco, Forest River, Coachmen, and New Horizons. SnapPads are constructed from a hardy recycled rubber and add 75% more surface area. 13.25" total diameter, adds 1" of thickness to the jack foot. Shake tested to 50Gs. Temperature tested to 120°F and -40°F.