Universal design, one model will fit most RVs. Adjusts from 4Š—_ to 23-3/4Š—_. The entire jack has a black rust inhibitive coating and the crank handle is zinc coated to ensure long life and trouble free operation. 24002C has 5000lb. capacity, 24002D has 7500 lb. capacity, 24003D has 5000 lb. capacity.