Features: The voltage regulator is 9.9x3.7cm, small but convenient. Voltage Regulator Module is designed with over-temperature and over-current for protection, which is safe to use. The AVR automatic voltage regulator is a synchronous rectified voltage regulator, which is highly efficient with low heat. This Generator regulator is made of metal and is shock-resistant, moisture-proof and dust-proof, without additional troubles. The voltage regulator moduleFit for single-phase 2KW ~ 3KW gasoline generator. Specifications: Specifications:规格 Material: ABS Size: Approx.9.9x3.7cm/3.89x1.45inch Color: Black Applicable to: 168F/170F/2-3KW/GX160/GX200/GX210 gasoline generator engine Package Includes: 1x Voltage Regulator note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.