Prime-Line Products N 6563 Prime Line Universal Door Guide, 4-3/16 in L X 1 in W, Plastic, quot, White REPLACEMENT SIDE SUPPORTS  These floor-mounted sliding closet door guides provide your wardrobe door system with the necessary side supports, and they can be used to replace broken guides, or with the installation of new by-passing doors. EASY INSTALLATION  Installation is quick and easy, and the guide mounts with screws to the floor (not included). FITS 1-3/8 THICK CLOSET DOORS  These closet door bottom guides fit 1-3/8 thick closet doors by most manufacturers. DURABLE  Made with a heavy-duty plastic construction, these closet door guides are durable and made to last. SIZING  These closet door guides can be used with 1-3/8 thick by-passing doors. They measure 1 W x 1-1/8 H, and the mounting holes of these floor guides are spaced apart at 4-3/16 in. from center to center. A pack of 2 can supply 2 pairs of by-passing doors or one 3-panel door system.