"""The 2200 is general purpose residential grade sliding by-pass door hardware for 3/4"""" [19mm] OR 1-3/8"""" [35mm] thick doors featuring a extruded aluminum track. Convex track rails provide single point contact between wheel and track for quiet feather touch operation. Hangers include one or two 7/8"""" [22mm] dia. molded nylon machine turned wheels with three point locking plates. Hangers adjust without removing or relocating screws. Door guide adjusts laterally for quick door alignment."""