Fusion MS-OS420 4" Marine Box Speakers 100W - WhiteFeaturing an adjustable mounting bracket with all mounting hardware supplied these speakers are perfect for installation on a alloy vessel where flush mount speakers are not always practical. The solid construction and powerful sound combined with competitive pricing make the MS OS420 speakers a great value for money option. In The Box 2 x Speakers; 2 x Connection Wire; Mounting Hardwear; 2 x Mounting Brackets; 4 x Mounting Knobs; Manual.