The Diesel Anti Siphon Device is a practical solution for preventing fuel theft and ensuring efficient filling. With its 4mm thick aluminum side walls and 2.5-inch fill neck, this device is built to last. Installation is a breeze, requiring no drilling, riveting, or maintenance once installed. Its hands-free filling feature eliminates splashback, making it convenient and mess-free. Tested on high flow pumps filling up to 50 gallons per minute, this device is reliable and efficient. Sold individually, it fits most Kenworth Class 7 and 8 models. Protect your fuel and streamline your filling process with this reliable device.