Designed as a direct replacement for Bendix AD9 12V air dryers with a standard cartridge for dependable performance. Equipped with a 75W, 12V heater to prevent freeze-up in cold weather conditions. Features 0.5" supply and delivery ports, 0.25" control port, and 7.125" diameter for OEM-style fit. Built to remove moisture and contaminants, extending air system and brake component life. Cross-references with multiple OE and aftermarket part numbers including Bendix, Freightliner, Volvo, Mack, Navistar, and more.