The Drop-In Hidden Horn V.3 is a horn only (grill sold separately). Hole size 2-3/4” diameter. At 111 decibels and a frequency (Hz) of 370±20A, this horn meets US Coast Guard's COLREGS and ABYC standard A-23 for use on vessels under 12m (39 ft). Constructed of powder coated steel and injection molded nylon. NMMA Type Accepted #2577066. 12VDC.
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