Carefree TT1530042W SideOut Kover II  White  150" - 153" Slideout Awning Flange size range: 155"-158"; Roof size range: 150"-153"; Fabric width: 157" Accommodates extensions up to 42" Includes full length aluminum wind deflector to prevent billowing during travel Extends and retracts automatically with the slide room Helps keep leaves, dirt & debris off slideout and our of RV