Johnson 111 Series is a  Heavy-Duty Sliding Door Box Track - for single, bi-parting, and by-pass door applications.
CHARACTERISTICS
Max. Length 192" (16'- 0") 4877mm 
Application Commercial/Residential 
Track Profile Box 
Track Material 6063T6 Extruded Aluminum
Track Finish Mill Grade Aluminum 
Width 1-7/32" (31mm)
Height 1-1/32" (26mm)