Fiberglass Biaxial Cloth 1708 is 17 ounces per square yard. Mat backing is 8 ounces per square yard.  This yields a total weight of 25 ounces per square yard.  The mat backing adds extra thickness and makes for a smoother finished product when applied over scratches and dents. This cloth is ideal for repairs, tabbing, and reinforcing.  50" wide x 1 YARD long