About this item USAGE - For 1 3/4" Thick Doors. HEAVY DUTY - 125 LB. capacity maximum panel weight. SMART DESIGN - Rollers cannot jump off track. QUIET - Patented "tricycle" hangers with 1" [25mm] dia. wheels ride smoothly and quietly. SOLID MATERIALS - Precision extruded commercial grade aluminum track. Part number 134F. › See more product details