Poly-Planar MA-4054 4" 80 Watt Speakers - Black [MA4054B] Marine Hardware | Chocks They have an "HR" imprint

They have an "HR" imprint for easy identification

50 Amp 125/250 Volt Locking Plug

the CP570 sonar module bring best-in-class target separation and high resolution CHIRP sonar imagery to Raymarine multifunction displays

oils and chemicals

The MS-CBUSB3

Poly-Planar MA-4054 4" 80 Watt Speakers - Black [MA4054B] Marine Hardware | Chocks They have an "HR" imprintMA 4054 4" 80 Watt Speakers Black MA 4054 is a 4" cone size two way coaxial speaker. This speaker featured a rugged waterproof design, Teflon coated wires, plastic grills, polypropylene cones, mylar tweeters and plastic frames, to provide years of trouble free service. Ultra low magnetic field speakers eliminates the problem of speakers magnets affecting navigation equipment such as compasses and autopilots. Features: Ultra low magnetic field speaker