RV Slide Out Support Jacks Set of 2, 6000lbs Heavy Duty Supports, Adjustable 20"-49" Height by Power Drill or Handle, Slideout Stabilizer Jacks RV Camper Accessories for Travel Trailer-Black. 【𝑼𝑷𝑮𝑹𝑨𝑫𝑬𝑫 6000 𝑳𝑩𝑺 𝑳𝑶𝑨𝑫 𝑪𝑨𝑷𝑨𝑪𝑰𝑻𝒀】 Outperforming the standard 5000 lbs market limit, our heavy duty support jacks are engineered from high-strength alloy steel and reinforced galvanized tubes.