DT30 is a black Child Resistant Certified and tamper evident dropper with a ribbed skirt, rubber bulb, and glass pipette with graduated markings. This dropper has a 77mm dropper and has a neck size of 18-415. This dropper fits on 1oz (30ml) Euro round bottles. This dropper is perfect for essential oils, e-liquids, pharmaceuticals, fragrances, and other liquids.