The L260 is a white PP plastic 120mm ribbed skirt triple-thread lid with pressure sensitive (PS) liner. This cap comes with a pressure sensitive (PS) liner. Pressure sensitive liners are made from foamed polystyrene. When the cap (with liner installed) is affixed to the bottle, the liner adheres to the bottle's landing/orifice. Before product can be dispensed, the lid must be removed and the PS liner peeled off and discarded. 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 120mm opening. Please read 5 seals and how they make perfect liners for your container for more information on liner types.