Size Imformation: These straight tip slass droppers is about 21mm wide, 81mm long; Capacity is 15ml,which can be used with with DIN18 bottles(Please notice that the bottles is not included).24 Sets: 24sets 15ml long glass dropper +1 pcs rectangle plastic bead containers. Bottles are packaged in grid-shaped partition and thick carton box to prevent damage in transport.High Quality Material: These essential oil dropper bottles are made of strong glass, thick black plastic lids and corrosion-resistant silicone tops.Leak-proof & cost effective: The lids create a tight seal so that they will not leak and waste product. Your eye droppers will pay for themselves in no time with the ease of use and dropper precision. Smooth rounded dropper bottom for gentle ease of use.Multi Uses: Great for DIY essential oils, colognes, tincture, cosmetics, perfume oils, beard oil, hair oil or other liquids. The eye droppers allow for the perfect amount of product to be used every time.