BAL 25037 Classic Series King Pin Gooseneck Tripod Stabilizing Jack with Extension Leg – Heavy-Duty RV Stabilizer for Gooseneck Trailers – Height Range 39" to 41"

Works on 2-5/16" gooseneck ball onlyYou may also like BAL 24003D Classic Scissor Jacks – Set of 2 Manual Stabilizer Jacks for RVs & Trailers – 30" Lift, 5000 lb. Capacity Each, Durable Steel, Bolt-On or Weld-On.