• Can be installed with a pneumatic nail gun or hammer • Two coils of 1-3/4 nails provided • External convolute baffles - incurved design allows flexibility to roll up and out while maintaining its shape • Can be cut at one foot intervals - multiple cut lineseliminates unnecessary scrap • Weather protection and performance with no filter to clog • Molded fanfold end plug • Molded centerline • Nail holes marked every 6 - supported every foot • 11 square inches of net free ventilating area per lineal foot • External venturi baffle • Adjusts from 2/12 to 16/12 roof pitches • Miami Dade County Approved #08-0611.05 • 52 CFM at wind velocity of 3 MPH; 148 CFM at wind velocity of 8 MPH; 283 CFM at wind velocity of 15 MPH. • Wdth In x Lgth Ft=14-1/2 x 30 • Color=Black