4 Pcs Racewill 15000 lbs Trailer Jack Block Travel RV Camper Stabilizer Blocks

4 Pcs Racewill 15000 lbs Trailer Jack Block Travel RV Camper Stabilizer Blocks Heavy duty RV jack blocks, supports up to 15,000 lbs per block Provides 4-inches of lift, trailer jack block can get more height if stacked on top of each other Provides stability for RV stabilizer blocks, eliminates nearly all movement and sway in parked RV's and Trailers Dimensions: 4" tall, L:9.5", W:9.5" at base, L:9", W:9" at top Racewill trailer blocks supports virtually any jack, compatible with 10-inch round jack feet , RV 5th wheel camper, post, foot, tongue Jack, or stabilizer round, square pad leveler