Dometic B3310524 9100 Replacement Vinyl Fabric Only For 9100 Power AwningsReplaces Vinyl Fabric with Vinyl Weathershield How to measure patio awnings: When replacing awning roller tube or fabric, most cases you can open your awning and on the roller tube it should have the brand and the model number which is the easiest way to get the correct size and specific color if replacing the same color. In the instance you are unable to get that model number; you can always measure by specifying the center of arm to center of arm measurement and NOT the length of the fabric or roller tube; also is there is a metal weathershield with your awning and is there is color on both sides of the fabric (for fabric replacement). Please Note:Per the manufacturer these Awning Replacement Fabrics are folded and boxed. Each awning replacement fabric has a shelf life of 10 days starting from the day they are boxed. If the 10 day shelf life has expired it may cause wrinkling and creasing to your fabric, so please plan accordingly.