This shelf feet and top cap set is compatible with HDX heavy duty shelving units and fits both 18-inch and 24-inch versions of the same shelving style. The set helps convert unused shelving components into separate standalone storage sections, making it useful for customized storage layouts in garages, workshops, utility rooms, and home organization spaces. Designed for simple installation onto compatible shelf posts, these feet and caps provide added flexibility when reorganizing or dividing shelving systems. Please review product images and dimensions carefully before purchase to confirm compatibility with your shelving unit. This product is a third-party accessory designed to be compatible with HDX. Our products are not affiliated with, authorized, or endorsed by it and are mentioned for compatibility purposes only.