Johnson Hardware 72 In. 4-Door Folding Door Hardware is a truly exceptional set designed to your folding doors with a blend of functionality and aesthetics. This hardware set features top-hung hardware, allowing your doors to hang naturally, which reduces the risk of warping and ensures smooth operation for years to come. The breathing shock absorber hinges provide added protection against shocks from fast opening or closing, extending the life of pivots, guides, and hinges. Installation is made easy with surface-mounted pivot-guide components, saving you time and effort. Additionally, the automatic top door spacing system eliminates unsightly gaps, creating a polished and permanent look. Model Number: 1700726H