About this item [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]: 6.6FT/80"track, Each door…