This kills ants liquid ant killer reduces ant population within days and then destroys entire ant colony. The convenient dropper makes it easy to use in cracks and crevices. It can use the bait reservoirs in package to place bait in and put where needed. Kills ants up to 2-months. Active ingredient is sodium tetra borate pent hydrate. Comes in 2-ounce tub. Measures 1-3/8-inch length by 5-inch width by 5-1/2-inch height.