【High Quality】 - Made of high quality boroslicate glass 3.3 tubing, durable construction, temperature resistance, with uniform wall thickness and low thermal expansion coefficient. 【Graduated Bottle】 - Clear scale for easy observation of experiments; High boron silicon thickened material, firmly welded, detachable small nozzle, flexible and convenient to use. 【Internal Parts】 - Central screw cap: GL45, Lateral screw caps: GL14(2pcs); Both the red polypropylene material can be autoclaved, can withstand the heating and sterilization of 140*℃ steam, and can be reused many times. 【Wide Applation】 - Laboratory screw-top gas scrubber can remove impurities in the gas. Suitable for lab, chemical, biological analysis, environmental monitoring, industrial and scientific research. 【After Sales Service】 - Each part is individually wrapped and cased in Styrofoam to ensure that the goods will not easily damaged during transportation.If you have any questions about our products, please contact us and we will answer within 24 hours.