For 1" to 1-3/8" doors up to 35 lb. A most unique folding door hardware set that features top hung hardware, breathing shock absorber hinges, surface mounted hardware. Surface mounted pivot-guide components are ideal for the consumer because no hole drilling is required. Breathing shock absorber hinges prevent shock of fast opening or closing from deforming pivots, guides, and hinges. Top hung hardware allows door to hang naturally, reducing possible warpage. Automatic top door spacing eliminates unsightly gaps, permanently. Floating, soft action-trouble free from top to bottom. Steel woodtone finish track and brass colored parts blend perfectly with stained or natural wood doors. No. 1700363H: Opening size 36", 2 door kit No. 1700486H: Opening size 48", 4 door kit No. 1700606H: Opening size 60", 4 door kit No. 1700726H: Opening size 72", 4 door kit