The SWOOSH® Drain Gun® Double Shot™ allows you to clear drain lines BETTER than before. The SWOOSH® Drain Gun® Double Shot™ can use a single 20g cartridge or unleash the full power of the SG-2 and load two 20 g cartridges for 2.5X more SWOOSH®! The SG-2KIT features the SG-2 Drain Gun® Double Shot™, two 20 g SWOOSH® cartridges, a reinforced vinyl hose that's equipped with a tapered fitting to work on 3/8 in - 3/4 in drain openings, and a universal adapter for multiple drain line clearing accessories. It comes packaged in a blow-molded case with removable EVA foam.