This heavy-duty waterproof marine box measures 4 inches and is designed for outdoor use. It is suitable for mounting on various vehicles and equipment such as boats, trucks, jeeps, skid steers, ATVs, UTVs, RZRs, golf carts, tractors, and other powersports vehicles. The box provides a secure enclosure for speakers, protecting them from water and harsh weather conditions. Its durable construction ensures reliable performance in demanding environments. Easy to surface mount, it offers a practical solution for enhancing audio on outdoor and off-road vehicles.