Smoke Bombs fill gopher or mole holes with a smoke that eliminates the unwanted pests. Easy to use. Individual bomb is 4.5 inches long. Smoke Bombs can be used to eliminate rats, skunks, gophers, woodchucks, and ground squirrels. Smoke Bombs can be used on lawns, rangelands, golf courses, parks, reforested areas, open fields, and any non-crop areas. Active Ingredients: Sulfur 39.4% Potassium Nitrate 38.8% Charcoal Carbon 9.3% Inert Ingredients 12.5% Due to changes in shipping regulations, we cannot ship this item to California.