[Small space first choice]: 5FT=60″track, bi-folding door kit won’t take up too much of your living space, just need to leave more than 6″8 space next to your door opening to meet your needs. Suitable for door thickness:1-3/16″ 1-3/4″, single track load up to 330LBS per door. [Excellent product quality]: BONIKLUBA folding door hardware kit is made of high quality carbon steel, not easy to be bent and deformed, and the pulley part is made of high quality nylon, so that the pulley is as quiet and smooth as butter when sliding over the guide, which is the first choice of strong and durable hardware kit.