Christner Woodworkers heavy duty pocket door frame for standard 2x4 walls. The 3500-SYNCHRO series for converging pairs, which allows 2 doors to open simultaneously, and features Sugatsune Synchronized track and hardware that will easily carry solid core doors from 88lbs up to 176 lbs. Available in synchronized and synchronized with soft close open. This kit includes universal T floor guide, a manufactured LVL header that will stay straight and flat and 16 gauge ¾" x 1½" steel posts for added strength and stability. The LVL header is fully assembled including the top bracket so that the steel posts along with the bottom brackets can easily be snapped into place for a quick and easy installation. We recommend a solid core door with a maximum 1 3/8" door thickness in the 3500 series for proper clearance inside the pocket.