The FAMCO LRV 50 Louvered Roof Vent is a great heavy duty vent for use on pitched roofs. This Slant Back Roof Vent is one of the best built and most reliable on the market. It features a 50 square inch opening, louvers on three sides, slant back and a low silhouette. This vent works best when used with soffit or gable end venting. Quality constructed in 28 gauge Galvanized, and pre-painted 28 gauge Steel in black, brown,gray, or white.