4-20FT Sliding Barn Door HardwareRhombus Roller Track Kit, Single/Double/Bypass4 20FT Sliding Barn Door Hardware Rhombus Roller Track Kit, Single Double Bypass For Single Double Door Bypass 2 Doors HARDWARE ONLY, DOOR IS NOT INCLUDE ABOUT US: CCJH is a professional manufacturer, With 10 years experience in designing and manufacturing barn door hardware, now we have 40 hanger styles and 4FT 20FT track sizes(full size) to meet your different needs. All of our products comply with strict quality control and advanced technology