Pipettes are made of borosilicate glass,thick and durable. Graduation is very precise, clear and professional, the calibration marks are easily readable. The glass pipettes are environmental friendly and non-toxicIt is also reusable after clean up,and better than plastic pipette. Large reservoir of the glas dropper for receiving and dispensing liquids. Apply for testing laboratories, chemistry, microbiology, liquids, scents and more. Features: Color: as shown Material:glass,rubber Size:200x13mm-10ml,200x10mm-5ml Note: There may be little color differences depending on the resolution. There maybe some slight errors due to different measurements. Package included: 1/5pcs scale dropper