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Vesper Cortex External Weatherproof Speaker$35.00
This compact and sturdy speaker is suitable for mounting in virtually any place on board. It has an ultraviolet-resistant polymer housing designed for marine conditions with an IP66 rating. Surface mounting with a hole of 74.5 mm (2 15/16′′) in diameter; requires a minimum mounting depth of 56 mm (2 1/4′′).