For 3/4" or 1-3/8" doors up to 50 lb. Track is precision rolled heavy steel with convex rails. Hangers are heavy-gauge steel with zinc plating, and in reverse positions will accommodate both 3/4" or 1-3/8" doors. Wheels are 7/8" diameter molded from nylon and machined for size, smoothness and balance. Adjustable door guide is woodtone finished steel with woodtone nylon floating guides. Pulls are 3/4" diameter, brass-plated. 2 door kit.