ZEKOO has devoted to the development of barn door hardware over 10 years, improve and upgrade products to give each family the most appropriate choice ZEKOO 6.6ft sliding barn door hardware kit use for single door (doors not include) Q: How to choose barn door track size? A: Barn door track length should be at least twice of total door width. For example, if you barn door is 39.6'' wide, you will need 2*39.6'' = 79.2'' （6.6FT） long track, your opening will show fully, you can use the track which is a little bit longer and please let your door a little bigger than the opening. Q: How much ceiling space requirement of the single door hardware system？ A: At least 6" from top of door to ceiling to install. Q: How much gap of the barn door hardware system? A: The gap between inner door&wall is about 5/8'' based on door thickness 1-9/16'' Our instructions step by step with fractional measurements in inch, and have detailed word instructions with pictures 1. Mark and drill track holes, install the track on the wall Pre-drilled 16" apart holes on track Keeping the track level is VERY IMPORTANT Our bolt is 8.8 grade high strength bearing capacity, fit for concrete wall and wooden wallIf your door is thicker than 1-3/4" or has doorway trim, we have 2'' spacers that can be free for you, please tell us2 X 3.3 FT track5 X 1-3/8'' spacers 2. Install Door Stoppers on 2 sides of track The stopper can prevent the door falling off from the track, one door has 2 stoppers, ensuring the stability and safetyRubber covered, good damping effect, reduce the noiseUse 2 screws to fix the stopper on the track, it is very fasteningYou can put it on the track where you want to stop your door, easy to remove if you want to adjust2 X stoppers 3. Attach steel hangers to your door Door weight capacity is 230lbs, fit for door thickness is 1-3/8" ~ 1-3/4"We have different bolts for your different thickness doors if you need, please tell us, and we will provide them to you for free.Wheels are very quiet, smooth, and steady when sliding2 X hangers 4. Hang your door and install Anti-jump Pad on top of the door. Anti-jump Pad can prevent the door to be lifted off the rail, ensure the stability and safetyOne door install 2 anti-jump pads on top of the door2 X anti-jump pads 5. Adjusting your door the opening and closing positions then install floor guide Floor guide can prevent the door from swinging out or up against the baseboard, let your door slide on the same locusOur floor guide has 2 installation methodsIf you don't want to install it on the floor, we have different kinds of wall guides that can help your project, please tell us1 set X floor guide 6. How to choose the size? Track's length should be twice of total door width or the opening (you can use the track which is a little bit longer). For example, if your opening is 39.6'' wide, you will need at least 79.2'' long trackThe gap between door&wall is about 5/8'' , ( based on door thickness: 1-9/16'' )Ceiling space from the top of the door to the ceiling only need 6'' About some questions Q: How about If the studs don't line up with the pre-drilled holes in the rail or there is a doorway trim? A: You can add a header board Q: Do you accept customization? A: Yes, we are a professional factory, and accept mass customization About Our Product High purity bearing steel Gcr15 (Special material for bearing), ensures smooth sliding and stand wear and tearThe material is heavy duty high carbon steel, thickness is 1/4''We have a large processing factory and advanced equipment, excellent professional design, production, and workmanshipOnly the hardware is for sale, the door is not includedStraight style single door barn door hardware can help you save space and easily complements your kitchen, wardrobe, bathroom, bedroom, and storeroom