●【Adjustable Design】:The stabilizer jacks support 5,000 lbs.Each and adjust from 19.7" -46.7" H. The 5" dia. ●【Stability】:The support stands to help a little bit in the stability of the trailer.Great for providing support and stablize to RV slide outs when extended. ●【Built to Last】:Constructed of heavy duty steel, Each camper slide out stabilizer is finished with a zinc powder-coating for longevity and resistance to rust and corrosion. ●【Product Specifications】:Package includes 2 PCS camper slide out stabilizers travel trailer leveling jacks to add to your camper accessories. ●【Suggest】:It is suggested to use concrete blocks or wooden leveling blocks for campers to stabilize the RV slide out jacks on an even surface.