Alwsci Lab Gas Washing Bottle Glass 500Ml Graduated Lab Buffer Bottle,, 1Set Superior Glass Material: Made of high-purity and clear boroslicate glass 3.3 tubing, with uniform wall thickness and low thermal expansion coefficient Autoclavable: The Reagent Bottle can use on -198C to +500C, the screw PP cap pouring ring can use up to +140C, reusable, enviromental friendly, transparent, easy labeling Multifunctional: Laboratory screw-top gas scrubber can remove impurities in the gas. It can also be used as a buffer bottle in a distillation environment to extend the service life of the vacuum pump Wall Thickness:The thickness of Bottle wall reaches 3.8mm, far exceeding the international level.The uniformity of the wall thickness of the product is more consistent, and the wall thickness error does not exceed 0.1mm. The permeability of the bottle body Better, better aesthetics ?Graduated Bottle?- Easy-to-read scale with graduation marks to estimate the content