The L378 is a black PP plastic 20-410 ribbed skirt spouted dispensing cap. This cap is used primarily for industrial applications like cleaners and solvents, but can also be used with lotions, creams, and other personal care products. The orifice opening is 0.126 inches. This lid is made of polypropylene (PP), which means it has a high heat tolerance level and an excellent resistance to fatigue. This closure fits a container with a 20-410 neck finish. The first number refers to the diameter of the container's opening (in mm). The second number refers to the thread/style/depth of the closure's skirt.