Cost less than perimeter blocking under doors and windows, easy installation, doors easily adjusted, never settles, D.A.P.I.A. approved, unaffected by frost heave damage. Sold in pairs. Includes hardware.
For use in supporting doorways and windows for manufactured housing and portable buildings. Adjustable with threaded rod design. Added base blocks allow additional height. Adjustable system with nut is easy to use. Light, compact design.