This product is a black 28-410 Dispensing cap that is perfect for cleaning chemical or car care products. These caps are used for products such as soaps or dressings, products that are thicker in nature. You will want to also buy plugs to go along with this so that product will not leak in shipping. While these do not naturally leak, sometimes in shipping the turret will sometimes flip open if it snags onto something and hypothetically could cause leaking. The plug is a safeguard to prevent against this. a