Johnson Hardware 100FD484 Track Hardware Set For 4-Panel Bi-Fold Doors, 48" The Johnson Hardware 100FD Series 48" Track and Hardware Set for 4-Panel Bi-fold Doors is a commercial-grade folding door hardware system. For door panels 1-1/8" to 1-3/4" thick, 12" wide, weighing up to 75 pounds per panel. Designed to carry heavy solid core doors. Patented tricycle hangers with large ball bearing wheels ride smoothly and quietly on convex shaped rails with precision single point contact. The hangers feature a quick disconnect clip system to facilitate easy mounting or dismounting of door panels. The 100FD is commercial grade bi-folding door hardware designed to carry heavy solid core doors. For door panels 1-1/8" to 1-3/4" thick, 12" x 108" wide, weighing up to 75 pounds per panel. Designed to carry heavy solid core doors. Patented "tricycle" hangers with large ball bearing wheels, ride smoothly and quietly on convex shaped rails with precision single point contact. A quick disconnect clip system facilitating easy mounting or dismounting of door panels. 14 - 16-gauge zinc trivalent plated steel parts. Specifications: Series: 100FD Type: Commercial Grade, Heavy Duty Track Length: 48" Gauge: 14 - 16 Max. Weight Per Panel: 75 lb Material: Aluminum Finish: Zinc Trivalent Plated Steel Standards: ANSI Specified 4 Panels Max Panel Width: 12" Max Panel Height: 108" Panel Thickness: 1-1/8" to 1-3/4" Usage: For Interior Application Includes: (1) 100 Track Length (1) 107 Top Pivot Set (2) 1125 Door Hangers (2) 1155 Track Stop (6) 1606 Hinges (2) 1706 Bottom Pivot (1) 1011 Pivot Bracket (5) 1808 Door Aligner (1) 33 Door Knob (1) 1712 Adjustment Wrench.