The Diesel Anti Siphon Device is a practical solution for preventing fuel theft and contamination. Made with 4mm thick aluminum side walls, it ensures durability and longevity. The easy installation process requires no drilling, riveting, or maintenance once installed. With a 3-inch fill neck, it allows for hands-free filling without splashback. Tested on high flow pumps filling up to 50 gallons per minute, it guarantees efficient fueling. This device fits most International, Mack, Volvo, and Western Star Class 7 and 8 models from 2002 and older. Sold individually, it offers a reliable and cost-effective solution.