Atlas Giant Destroyer 00333 Gas Bomb - Gopher, Mole and Rat Killer - Pack of 2 4packs (8 total) Kills Gophers, Moles, Woodchucks, Rats, Skunks, and Ground Squirrels Cartridge Size: 2 oz each 4 cartridges per card, 2 cards per pack. 8 total tubes. Cartridge can be instantly extinguished with water