Subcompact Box Speakers Part Number: MA-840W SHIPS FREE IN LOWER 48 STATES These subcompact box speakers are designed to fit in difficult locations and still offer high quality music sound. The ultra-low magnetic field design lets you mount them anywhere without adversely affecting navigation equipment such as compasses and autopilots. Polypropylene cones, stainless steel grills and brackets, and heavy-duty ABS enclosures make them corrosion-proof and waterproof. Dual cone design with 3" main cone size. Features Ideal for locations where other speakers won't fit Only 4" x 4" Ultra-low magnetic field speaker Stainless steel grill and bracket Available in black and white