GAF Slateline 33.33-sq ft English Gray Architectural Roof ShinglesDiamond Cut Granules add dimension and depth to the shingle with their multifaceted design and light reflective construction Micro Weave Core offers a strong foundation that helps resist cracking and splitting UV Blocker (granules) protects against damaging sunlight for durability and long life Dura Grip Adhesive seals each shingle tightly and reduces the risk of shingle blow off Features Series Name Slateline Shingle Length (metric) (Centimeters)