4-20FT Sliding Barn Door Hardware Top Mount T Hanger Kit. For Single /Double Door. HARDWARE ONLY, DOOR IS NOT INCLUDE. All of our products comply with strict quality control and advanced technology makes CCJH Sliding Barn Door Hardware more reliable. Material: Carbon Steel Door weight capacity: 220lbs Sliding Length: 4ft-20ft for your choose The top of the Doors to the ceiling : Small Wheel Min distance is 6.7;Big. Wheel Min distance is 8.7. Suitable Door Panel Thickness: 1 1/4 to 1 7/8 inch. 1Suitable Roller hanger screws from. 1 1/4 to 1 7/8 inch. 2Rubber accessoriers & Spring door stops, has buffering effect when sliding door, reduce noise. 3Anti-jump Disk: Mounted on top of the door, prevent the door from popping out of the track during movement. 1 2 x Rollers 2 Wall Hanger Set (1 rail hole need 1 set) 3 2 x Door Stops 4 4 x Adjustable roller screws 5 2 x anti-jump blocks 6 1 x floor guide 7 Pre-Drilled Spliced rails Note: Only the sliding door kit for sale, door is not include. 1 4 x Rollers 2 Wall Hanger Set (1 rail hole need 1 set) 3 4 x Door Stops 4 8 x Adjustable roller screws 5 4 x anti-jump blocks 6 2 x floor guide 7 Pre-Drilled Spliced rails Note: Only the sliding door kit for sale, door is not include. (we work from Monday to Friday). Q:How to choose Track Size? A: 1 Single Door Min Track Size= 2 × Single Door panel Width (Like you door width is 3FT, you will need 6FT Length Kit) 2 Double Door Min Track Size= 4 × Single Door panel Width. (Like you door width is 3FT, you will need 12FT Length Kit). Any questions please tell us, Our customer service will help you within 24 hours.