[100% Customer Service] - We are glad you choose to buy empty eyelash brush tube from YITOU store! If you have any questions, please contact me! I will give you a satisfactory answer within 24 hours!. [Leak-proof Empty Tube] - The lids and rubber inserts are match on these tubes are tightly sealed to keep the air out. Is the perfect solution for applying castor oil, make up, or other products to your eyelashes. [Mascara Gadget] - Sample size. Using mascara brush tube for serum to grow lashes, put castor oil in these tube for lashes, brows and eyebrows. Portable for business trip, daily use, makeup artist makeover, your brow clients, help you launch your lash business. [Wholesale Eyebrow Brush Bottle] - Sample containers for lash & brow care (hair growth), suitable for eyelash and eyebrow serums, mascara, eyelash growth liquid, hairline cream, Eyebrow-dyeing Cream holders. Nicely made. Super cute!. [Eyelash Brush Bottle Sets Bulk] - Portable size, clear bottle height 108.8mm, diameter 16mm, capacity 9.8ml. Package includes: 12* empty mascara tube with rod, 12 inner stopper, 2 funnel.