Need top-quality wire for a boat, RV, or any project exposed to moisture? This is the real deal: marine-grade primary wire from Sherco-Auto, made in the USA. It's 10 AWG gauge, and the copper strands are tinned, which means they're coated with a thin layer of solder to prevent corrosion from saltwater and humidity – a huge deal for longevity. The insulation is PVC and rated for 600 volts, with excellent resistance to abrasion, chemicals, and weather. You can choose from spools of 25 feet, 100 feet, or a massive 500 feet, and it comes in TEN different colors. This makes color-coding your electrical system a breeze. Whether you're rewiring a boat, building a custom vehicle, or need durable wire for outdoor power, this tinned copper wire is a professional-grade choice that will last for years without degradation. Invest in good wire once!