The Ross150CM Roof Vent™ is a patent-pending product that provides ventilation for flat-roof applications. It utilizes all the enhancements of the Ross 150 static roof vent, but with a fabricated “curb” to easily install over a building curb. The product has passed the TDI E330 Wind Uplift test and the stringent Miami-Dade County TAS 100 (A) 110 MPH Wind & Water test. It is Class 4 hail resistant (UL 2218), so it will not dent or rust. Since it is made of recycled, no-break polypropylene, it a green product. For more information, visit www.rossmfg.com.