1. Durable Material: This 3 wire voltage rectifier is made of premium aluminum alloy, which is corrosion resistant, durable and has a long service life. 2. Scope: AVR Generator Automatic Voltage Regulator Rectifier can be used compatible 170 178 186 188 diesel generators. Fits your machine perfectly. 3. Direct compatiblement: The automatic generator voltage regulator is easy to install and disassemble, you can easily compatible old or damaged parts. 4. Stable percompatiblemance: The generator automatic voltage regulator has good wear resistance, high reliability, stable percompatiblemance, more reliable and convenient to use. Not easily damaged. 5. Good Workmanship: Adopting exquisite workmanship, beautiful appearance, giving you excellent using experience. Practical generator accessories. Specification: Item Type: AVR Automatic Voltage Regulator. Material: Aluminum Alloy Gross Weight: 221g / 7.8oz Product Size: Length: 7cm/2.8in, Width: 7.9cm/3.1in, Height: 3cm/1.2in Distance of hole: 6.5cm / 2.6in Aperture: 10 x 8mm / 0.4 x 0.3in Application: compatible diesel generator 170 178 186 188 How to use: It can be directly installed and used according to the model used. Package List: 1 x Generator Accessory