1.Graduated dropper is a common laboratory glassware, usually made of glass.
2.Graduated dropper are thin cylindrical and with a scale, easy to measure the amount of liquid.
3.Lead-free glass containing potassium, more for high-end arts and crafts and a logo on the outer packing.
4.Burette is used for accurate release uncertain quantitative liquid capacity of the instrument.
5.Made with thin and uniform glass tube, tube on the scale, the bottom is a pointed mouth.