To determine which size of SlideTopper you require, measure your room's width from flange to flange. Refer to the chart for recommended size.The SlideTopper will not work on rooms with a full extension greater than 44".
Per the manufacturer these awning replacement fabrics are hand rolled and put in tubes rather than boxed, avoiding wrinkling and creasing to the fabric. These Dometic replacement fabrics will ship via freight truck, so please plan accordingly.
"Fabric length" is based off of the length of the whole awning (i.e. 834XX15.XXX) which will determine the "size" of the fabric needed. The actual fabric will almost always be a smaller measurement than the awning length.