Prime-Line M 6221 Shower Door Guide, White Product Description This shower door guide is constructed from white plastic. It features a bottom mount, self-adhesive design. This style guide is used on framed tub enclosures. From the Manufacturer This shower door guide is constructed from white plastic. It features a bottom mount, self-adhesive design. This style guide is used on framed tub enclosures. Features For use on sliding (top hung) shower door (tub enclosure) systems These shower door bottom guides help keep sliding door panels centered to their respective tracks Constructed of white plastic. Mount On: Bottom Easy dual-stick adhesive tape installation Guides measure 4-1/16 in. wide with 1-3/16 in. tall face and fits glass thicknesses of up to 9/16 in For further dimensional information, please see the line drawing USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.