Size Information: The glass dropper measures 77mm/3.03 inch in length and 7mm/0.28 inch in diameter; the rubber tip measures 30mm/1.18 inch in length; and the packaged plastic tubing measures 110mm/4.33 inch in length and 17mm/0.67 inch in diameter. Product Materials: Mainly made of premium rubber and highly transparent thick glass, you can use them without any worry. How to Use: Pull out the rubber squeeze tip on the glass dropper into place so that the rubber tip can be squeezed to absorb the solution; easy to clean, removable and separate for cleaning to achieve better cleaning results. Wide Application: Perfect tool for dispensing liquids, essential oils, spices, pigments for beauty care, perfume making, painting, etc. Specification: Material: rubber colour: As Shown Package Contents: 4 x glass droppers 1 x brush Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.