Feature: This item is a professional and practical fuse holder. Protecting circuits and electrical equipment. Suitable for standard blade style fuses, include fuse here. The unique design of the dual slot tight-fitting waterproof lid enhances moisture proof, waterproof performance, and dustproof. Good quality materials ensure good bending performance, melting resistance, and good electrical conductivity. Good look and added protection to the circuit. Easy to add additional circuits for cars, CD players, fax machines and etc. When the circuitry is overload the duse will trip and protect your safety. Specification: Material: Plastic, Rubber Color: Black, Red Harness: 12AWG Amperage: 40A Fuse Holders Dimension: 4.6x2.4x4.9cm / 1.81"x0.94"x1.93"(L*W*H) Wire Length: 18cm / 7.09" Fuses Size: 2x1.9cm / 0.79"x0.75"(L*W) Application: suitable for vehicles, Marine. Package Includes: 2 x Car Fuse Holders 2 x 40A Fuses 2 x 30A Fuses