Our speakers hold up onboard with corrosion-proof aluminum mesh grilles and all stainless and brass hardware.We've worked with a manufacturer who can meet all of our tough specifications for marine stereo speakers to design superior quality, long-lasting waterproof marine speakers at an attractive price! Waterproof, round two-way speakers feature corrosion-proof high-impact plastic grilles and all stainless and brass hardware. A polypro cone, cloth-edge woofer and 13mm mylar tweeter optimize the sound quality. Includes stainless steel mounting bracket and mounting hardware.Key FeaturesPolypro cone, foam-edge woofer and 13mm mylar tweeter with neodymium magnet optimize soundFrequency Response: 100 – 20,000 HzMounting Diameter: 5 3/16"Cone Diameter: 4"Cutout Size: 3 5/8"dia. x 2 5/16"DStyle: Flush mountWatts: 120W/pair Impedance: 4 ohmsMagnetic Shielding: NoWaterproof Rating: Waterproof exteriorMaterial: Aluminum grille, plastic caseBrackets: N/AQuantity: PairWarranty: Three years