ANTI-CORROSION GLASS - The bottle is made of BPA and lead free corrosion-resistant glass which makes it thick, smooth and anti-shock.The amber bottle protects essential oil from harmful UV rays to avoid rapid volatilization STAINLESS STEEL ROLLER BALL - The roller ball is made of stainless steel with corrosion resistance and excellent production. The tightness of the insert prevents any leakage while the roller ball makes it easy to apply the oil evenly, no more rollers getting stuck or falling out Dual Caps: The screw thread finish bottle mouth is matched with a plated aluminum alloy cap, which fits tightly and can effectively prevent any liquid leakage. You can also design your essential oil formulations with these essential oil roller bottles to would help you to relax during salon or aromatherapy REUSABLE & VERSATILE - Reusable, Essential Oil Roller Bottles. Suitable for applying diluted essential oils, perfume oils, blends, or other liquids to meet your needs of daily care for eyes, faces, and body UTILITY TOOL--Package includes 24 pieces empty roll-on bottles with roller balls and black caps, 24 Pieces essential oil bottles stickers for marking and classifying oils, 1 Essential oils opener for easily removing roller balls,2pcs Funnel and the 2pcs dropper is ideal equipment to transfer and dispense liquids These high quality amber glass roll on bottles are perfect for use with essential oils, perfume oils, and other liquids. Snap in the roller-ball by gently placing the roller-ball in the bottle and then firmly tighten the cap until the roller-ball snaps in. Use the roll-on bottle to apply the perfect amount of product each time. Remove the roller-ball by applying pressure with the cap. This small vial is a handy way to apply essential oils, blends, perfume oils, and massage oils to the skin—simply roll them on as needed! The dark amber color helps protect contents from damaging UV light. (These amber glass roll on bottles with stainless steel roller balls work best when the essential oils are diluted with at least an equal amount of carrier oil.) Lead-free Solid Amber Glass Leak-proof Stainless Steel Roller Ball Come with waterproof labels, opener, dropper package Contents: 24 pcs 10ml amber glass roll on bottle with caps 24 pcs Gold caps 24pcs waterproof essential oil bottle labels 24pcs extra ordinary roller balls 1pcs bottle opener 2pcs Funnel 2 pcs dropper