The SLP150 is a large size roof louver with a slant-back design for a more desirable look. It provides 150 square inches of Net Free Area which means fewer units required on the roof. It is made of a high-impact polypropylene material that will not rust and includes an integrated pest guard to keep small animals and insects out of the attic. The SLP150 comes in four colors (black, brown, gray and weatherwood) to coordinate with various shingle styles. For more information, call 800-247-8368, visit www.airvent.com or stop by booth 1353.