9sparts 6.6 Feet ft 2m Black Country Style Carbon Steel Sliding Barn Door Window Hardware Track Rail Kit for Wood and Concrete Wall Condition: Brand New ; Material: High Quality Steel ; Surface: Frosted Black Pa66 Nylon Wheels with Dual Bearing, provide non-noise When Sliding 16" Hole Distance From Center to Center, Directly Mount on Stud, Fits our American Home. All Mounting bolt Grade is : 8.8, Door weight capacity: 220lb Manufactured by 9sparts, 1 year parts warranty.