VHF Flush Mount Extension Speakers Part Number: MA-1000R This slim, dual-cone waterproof communications speaker with 20 watts of power is ideal for use as a VHF remote control. Designed for flush mounting, it fits into a 4-¼ diameter cutout. Comes equipped with a mini-plug. Features Completely waterproof and corrosion resistant.. Features stainless steel grills, rugged plastic frames, polypropylene speaker cones, and Teflon-coated wires.. Designed for use as a VHF remote control. Available in black or white speaker colors. Specifications Maximum Power: 20W Each. Speaker Impedance: 4 Ohms. Cutout Diameter: 4-3" (110 mm). Overall Diameter: 5-15?16" (5.945 in). Mounting Depth: 1.614 in. Weight Per Unit: 0.65 lbs.