This sliding closet door bottom guide is constructed of plastic and comes white in color. Each bottom guide mounts with 2 fasteners and they are designed to accommodate 1-3/8 inch by-passing closet doors. This pack supplies 2 pairs of by-passing doors, or one 3-panel door system. The mounting holes of these floor guides are spaced apart at 4-3/16 inch from center to center, and they feature 1-1/8 inch tall supports. These by-passing sliding closet door bottom guides are easy to install and are used by many closet door manufacturers.