OX BLOX MAXX Heavy Duty Trailer Jack Block - 10.5x10.5x4.5 Inches - 6.8 lbs Weight - 5th Wheel RV Jack Block for 9" Round Feet - 9" and Smaller Feet Nest Securely Within Ridges

Ensure RV Stability: Eliminate most movement with the strongest RV stabilizer blocks available. The corner ridges keep the foot secure and stable. Unique design provides the most stability & strength.. High Quality & Made in the USA: Patent-pending design by American engineers, these US-made heavy-duty jack blocks for travel trailer are made the old-fashioned way, UV-resistant and built to last.. Perfect Fit: Suitable for 9"" large round jack feet found on many 5th wheels & RVs. The shorter 4.25"" height of the trailer blocks for jack makes them convenient for stabilizer jacks, compared to a bucket block.. 10,000 lb-Capacity. The larger surface area of these camper jack blocks created by the web design on the bottom of the block is a more stable surface area than alternative blocks.. Size: Made of UV-resistant recycled plastic, the recessed pad area of these camper blocks for jacks is 9.25"" circle with a 5.25"" gap between ridges. Each block is 10.5x10.5x4 and weighs 6.8 lbs.