... , Static Capacity 50000 Pounds , Adjustment Range 44-51 Inches .2W878Medium Duty Trailer Stabilizing Jack , Lifting Capacity 40000 Pounds , Static Capacity 80000 ... Pounds , Adjustment Range 39-51 Inches .3KR77Medium Duty Trailer Stabilizing Jack , Lifting Capacity 40000 Pounds , Static Capacity 80000 ...