These blue plastic blocks lock together in multiple arrangements to level your RV on uneven ground. Each 8-5/16-inch square block adds 1 inch of lift, so stack all ten to reach 10 inches total or mix and match to suit your site. The 30,000-pound capacity handles most fifth wheels and travel trailers safely.

• Set of 10 interlocking blocks, 1-inch height each
• 30,000-pound weight capacity per stack
• Bright blue finish won’t disappear in grass or gravel
• Includes storage bag for transport