The L958BK is a black HDPE plastic 18mm tamper-evident dropper cap with inverted dropper tip (0.9 mm orifice). This cap is specifically designed for small glass bottles with an 18 DIN neck finish. When the cap is fully screwed down it forces a natural colored plastic orifice reducer and inverted dropper tip into the opening of the bottle. When the cap is unscrewed, the tamper-evident ring is broken and the insert remains inside the bottle opening. Matching bottles must have the correct neck finish specifically for this lid. It is designed for the glass euro style dropper bottle. This closure has been equipped with a mechanism that shows if the product has been tampered with. High density polyethylene (HDPE) is marked with the resin identification code of 2. HDPE has a high tensile strength, good resistance to chemicals, good impact resistance, highly rigid, and highly scratch resistant. Made in Germany. This closure fits a container with a 18mm opening.