Material: Gold Plated Metal, Clear Polycarbonate PC Shell Size: Length: 8.5cm / 3.34in, Mounting Hole Diameter: 7mm, Applicable Fuse Specification: 10x38mm Advantage: corrosion resistance, good electrical conductivity, flame retardant, high temperature resistant, moisture resistant, water resistant, not easy to break and safer Application: used for car audio, alarms, amplifiers, compressors. To prevent the current from being too large and automatically cut off the power supply for protection. Package content: 1 x AGU car audio fuse holder, suitable for 4 gauge wire/ 6/8/10, with 2 x 40A AGU fuses. Product Inline 40 Amp AGU Gold Plated Glass Car Audio Fuse Holder & Fuses Automotive fuse holder with built-in AGU fuse operates between the solar panel and the charge controller. The AGU fuse holder should always be installed at the battery end of the power supply of the amplifier to prevent the current from being too large and automatically cut off turn off the power supply for protection. Shape: flat tube Shell color: transparent Material: ABS plastic, gold-plated metal Power: 12V Rated current: 40A Fuse Type: AGU, 10x38mm Wire Specification: 4/6/8/10 AWG Function: To connect audio power lines, mainly to protect audio from the car and prevent short circuit. Application: Automotive Circuit Protection, Car Radio, Alarms, Inverters, Air Compressors, etc. Package Included: 1 x AGU fuse holder 1 x AGU 40A fuses