This is a dropper for measuring liquids. Please provide a set of 4. It is the item in photo 5. From the left of the photo, it is a set of 4: one 20ml, one 6ml, and two 3ml. All are new, unused, and unopened. The scale is for reference only, as clearly stated on the back of each product. We are not responsible for accidents due to incorrect use. Please use at your own risk. The stand and the background are not included. I work on weekdays, so please understand that shipping may take some time.