Lippert Component Solera Sliders are designed to fit rooms from 56\" to 188\" in length and extend up to 50\". The universal hardware hole patterns will match most competitive brands, which eliminates the need to patch holes. Permanently attaches to slide rooms and retracts/extends with the slide-out. Helps prevent dirt, debris, and water from infiltrating the slide room. All fabric is 5\" shorter than the overall slide topper width. Box width is measured on the outside front of the box, including the flange. The slider comes complete with all the hardware needed for installation. Note: The slider does not come with the awning rail. To ensure you order the correct Solera Slider, make sure the size will extend a minimum of 2-1/2\" beyond each side of your box width. Constructed of cold crack tested 13.5 oz. vinyl.