The DP255BK is a black PP plastic 20-400 smooth skirt up-lock dispensing treatment pump with 3.5 inch dip tube. It is designed to look like a finger tip fine mist sprayer. However, it dispenses product in a stream as opposed to a mist. This closure fits containers with a 20-400 neck finish. The first number is the diameter of the container's opening (in mm). The second number refers to the thread/style/depth of the closure's skirt. Dip tubes can be trimmed to fit smaller shorter containers. This treatment pump does not include a protective cap.