The 400 series Ultra Chiller system is a portable cooling system for race drivers. It circulates ice chilled water in a closed loop cooling system. Simply load with ice and water before your race and stay cool for up to 45 minutes. From extreme offroad to drag racing this system will keep your Ultra Chiller Liquid Cooling Shirt cool and comfortable. The system has 4" internal diameter and is 16" tall. Includes Stainless steel mounting straps, vented cap, 5 foot hose and a 12 volt power cord.