The SWOOSH® Drain Gun® Big Shot™ is designed to clear drain lines instantly. Larger 20 gram SWOOSH® CO2 cartridges deliver 800 PSI of oil free air to clear the line, with 25% more capacity. Each unit comes equipped with a tapered fitting to work on 3/8 in – 3/4 in drain openings. Flexible hose assembly maneuvers through cabinets, coils and hard to reach drains. Reduces labor costs and time on service calls. SWOOSH®, SG-1, Drain Gun Accessory, Specifications: 800 Air Pressure, 3/8 to 3/4 inch Line Size, 1.5 in H x 10 in W x 6.5 in D Dimensions