M-D Building Products Pocket Door Track Hardware and Wall Jamb Kit contains all necesarry hardware to convert standard doorways into a sliding pocket door. Kit contains a track header, split jambs and door trolley mounts that holds doors weighing up to 150 lbs. Designed to fit opening 24"-36" wide and up to 80" tall. Steel wrapped split jambs provide extra support for hanging wall substrates on outside of door pocket.