White, ribbed side, smooth top continuous thread cap with 18MM neck finish and a tamper evident ring. This closure also includes a Euro Dropper with a .039" orifice. Commonly used for essential oils, fragrances, natural remedies, and herbal extracts. Euro droppers give the option to dispense one drop at a time. Tamper evident rings are often used to detect tampering. When removed, the tamper evident seal will self-destruct to indicate that the seal has been broken.