1. Made of quality borosilicate glass 3.3 tube, durable construction, temperatureresistant, with uniform wall thickness and low thermal expansion coefficient. 2. Graduated bottle: Clear scale for easy observation of experiments; boron silicon thickened material, firmly welded, removable small nozzle, flexible and convenient to use. 3. Internal parts: Central screw cap: GL45, side screw caps: GL14 (2 pieces); both made of red polypropylene material, autoclavable, capable of withstanding 140°C steam heating and sterilization, and reusable multiple times. 4. Laboratory gas scrubber with screw cap can remove impurities from gases. Suitable for laboratories, chemical and biological analysis, environmental monitoring, industrial applications, and scientific research. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin