[EXCELLENT QUALITY]: Bi-folding door kit is made of high quality carbon steel with a matt black finish, ensuring the product is corrosion, water, fire, rust-resistant, durable, and maintains its beauty and longevity for many years. [PACKAGE INCLUED]: splicing track, 4 J-type pulleys, 2 rotating shaft, 2 anti-jumping discs, 2 door stops, all hardware needed for hanging door. Note that there is only hardware, [DOOR NOT INCLUDED]. [PRODUCT DETAILS]:5FT/60"track, Each door panel should be half the size of the door opening + 50mm (1.97") and the track should be more than 150 mm (6") wider than the door opening, thickness: 1.18''-1.58'', leave 6" from the upper edge of the door to the roof. [DETAILED INSTALLATION STEPS]: The package of bifolding door hardware kit contains the most detailed and simple installation manual, which makes your installation process easier and more interesting. [LIFE-TIME AFTER SERVICE]: 100% refund and return, no matter if you encounter any problems before and after the purchase, please feel free to contact us 24 hours a day, we will definitely actively solve the problem for you.