Marshall Stamping Extend-O-Post Series JP84HD Jack Post, 10,000 to 18,000 lb, 4 ft 8 in to 8 ft 4 in

Extend-O-Posts are ideal for temporarily reinforcing existing floors under heavy load areas, but are not recommended for permanent supports in new construction. There's nothing easier to use for supporting sagging floors, weak beams and warping stairways. With Extend-O-Posts the possibilities are unlimited. For temporarily reinforcing existing floors under heavy load areas Features: - Various load capacities ranging from 8000 to 18,000 lb - Flow-coated with red corrosion-resistant paint - Packed complete with installation instructions on a color-coded, trilingual carton