Description: 【Reliable Material】: Top Post Battery Disconnect Switch is made from brass and engineering PP material, designed to withstand regular use without compromising its functionality, ensuring durability and longevity even under harsh conditions 【Easy Installation】: This battery disconnect switch is designed for easy installation. Simply attach it to your vehicle's battery and enjoy a quick setup 【Waterproof Protection】: The waterproof design protects your battery and electrical system from water, extending the lifespan of your equipment and avoiding accidental disconnections for long term reliability 【Space Saving Design】: With its compact structure, this Battery Power Cut Master Switch Disconnect Isolator efficiently connect to the top of the battery's terminal without requiring extra cables or connections, keeping your electrical system organized and tidy 【Wide Application】: Ideal for use in cars, motorcycles, boats, RVs, and various electrical devices, this On/Off Battery Switch improves convenience and security across a wide range of applications Specification:Positive 17 To 19mm: Suitable for positive 17-19mm Terminal Size Chart: 12.5cmx6.6cmx4.6cm/4.92inchx2.60inchx1.81inch Package Includes: 1 Piece Top Post Battery Disconnect Switch Note: Please allow slightly errors 1-2cm differences due to manual measurement.