Provide economical protection for your slide rooms and keep slide room free of dirt, leaves and debris. Permanently attached and automatically extends/retracts with slide-out Extend up to 48”—that’s 8” more than competing brands! Measure slide room on the outside front of box, including flange and select the size that extends a minimum of 5" beyond total box width The hardware hole pattern is universal and will match most competing brands, which alleviates the need to patch holes Comes complete with mounting hardware