The CINETTO PS23A2DR90 PS23 Bifold Kit includes the 47 1/8 inch anodized black upper track, upper concealed hinges with trolleys and covers, and asymmetric hinges to join panels. You will need to purchase #8 screws and appropriate anchors for installation, common euro-type concealed cabinet hinges to anchor the first door panel, and an optional bottom guide rail for wider doors.