Sliding Door Track Hardware Set 6.6FT Brown Black Steel Antique European Barn Black The distance between the holes in the track bar has been upgraded to feet standard American 16" frame distance OUR SET IS DESIGNED TO FIT STANDARD AMERICAN STUD DISTANCE. THIS ENSURES SIMPLE FEW-STEP INSTALLATION. Material: high quality Steel.; Max. Door weight capacity: 220 lbs. Door Thickness: From 1.38inch to 1.77inch; For use with openings up to 40" Package Include: 5 x Wall Attachments & Spacers: Mount rail to wall; 2 x Door Stops: Keep rollers on rail; 1 x 78" Track: With pre-drilled holes for wall attachments; 2 x Rollers: For use with door; 1 x Floor Guide: Keep door in its position; 2 x Anti-Jump pins: Keep rollers on rail; 1 x Installation Manual