Procraft LH1018 Good to 600Hz. 17-13/16″ x 9-7/8″ x 7-1/2″ deep horn flare/lens.5-7/8″ diameter bolt-on platform with a 4″ diameter 4 bolt pattern and a 3-15/16″ diameter 4 bolt pattern. Easily drilled to mate with any driver. 2″ throat, 90 x 40 coverage, Heavy duty ABS construction. Cutout is 14-1/2″ x 8-1/16″. Great quality at a great price. Very sturdy, great for pro sound.