10 Pcs Lomanco LOR94 Lo-Omniridge Shingle Over Ridge Vent Black 9 x 4

Can be installed with a pneumatic nail gun or hammer. Four drain holes per foot per side. 11 square inches of net free ventilating area per lineal foot. External venturi baffle. Adjusts from 2/12 to 16/12 roof pitches. Nail holes marked every 6 - supported every foot. Molded nail lines and center-line. Alignment tabs. External water shield. Slot width guide lines. Molded fanfold end plug. Miami Dade County Approved 13-0701.10. 52 CFM at wind velocity of 3 MPH; 148 CFM at wind velocity of 8 MPH; 283 CFM at wind velocity of 15 MPH. Highlights: Plastic; Shingle-Over; Size: 9 W x 4 L; Color: Black; Internal aerodynamic curved baffles; External perpendicular omni baffles; Weatherproof underlapping joint;