"This foundation plate lets you create a stable surface for any trailer tongue, RV or jack on any terrain. No more need to worry about holes, mud, sand, soft earth or uneven ground. Plate is durable and will outlast wood or steel blocks. Will not mushroom, warp or absorb moisture. U.S.A. Dimensions L x W x H in. 12 x 12 x 1, Capacity Ton 20, Color Orange, Weight lbs. 5, OSHA Approved Regulation 29 CFR 1926.305. 20-ton capacity"