Dropping Pipettes made of high luster glass and durable rubber bulbs, clear color provides good observation during operation, make drops precise; washable and reusable, better than plastic pipette.Oil droppers with a clean brush, easy to clean, pinch the rubber cap to let inside air out, release to fill liquid, and pinch to let the liquid out. The black rubber caps can be removed and then rinse glass pipette stems with warm water. they are disassemble, washable and reusable.Pipettes use plastic tube to pack it for each dropper, package include 5 pieces glass droppers, 1 pieces cleaning brush. the first time you use it, you need to pull the black silicone tip up into position before you pinch it.Glass graduated droppers have wide application, can be applied to transfer various liquid, essential oil, fragrance, medicine, pigment etc. doing skincare, modulating perfume, making handmade beauty products, painting etc.Eye droppers capacity is 1 ml, clear glass is easy to see through, 0.25 ml, 0.50 ml, 0.75 ml and 1 ml scale clearly marked,making it easy and accurate to measure out oil and liquid.