This package includes a graduated dropper and a rubber sphere. Its main use is to transfer liquids such as essential oils, acids, and more. Widely used for accurate and easy measurements. Its material is glass and has clear markings on the surface of the eyedropper, very practical and reusable. Specifications Dropper Smallest Split Scale: 0.25ml Dropper Capacity: 1ml Dropper Diameter: 9mm Dropper Length: 77mm Material: Glass Rubber Color: Clear Package Content: 4 x Dropper 4 x Rubber Valve 4 x Storage Case with Lid 1 x Cleaning Brush Advantage The eyedropper is made of glass and is thick and durable for repeated use. Rubber balls have strong suction and absorb liquids well. In addition, the dropper and valve can be disassembled for easy cleaning, replacement, and storage. The dropper surface has clear, readable scale lines to accurately measure the amount of liquid Comes with a case with lid to protect the eyedropper from scratches and dust. Description 1.Clean the eyedropper and wipe the tip inside and outside before use. 2. Put the rubber ball sleeve in the mouth of the eyedropper. 3. Put the dropper into the liquid container and squeeze the rubber ball to absorb the solution. 4. After suction is finished, squeeze the rubber ball again to squeeze out the solution. 5. Remember to clean it immediately after use. 6. After washing, store the dropper in the storage case and take it out when needed. Note 1. After absorbing the liquid, the mouth of the eyedroppers mouth should not touch other objects. 2. After cleaning, put it in ventilated place to dry. 3. When cleaning, please be careful not to collision or damage.