4.3 cu. ft. capacity. No brackets required. Will fit any mower that has a 1-1/2" flatbar deck-support welded above and to the outer edge of the discharge opening. The deck MUST also have an opening no larger than the catcher opening. This includes most Exmark, Bobcat, Encore, Howard Price, and the new Exmark/Toro fixed deck models. Hole across top - approx. 11-1/4", hole across bottom - approx. 12", hole height at front - approx. 5-1/2"