Package content: including one split type cold well with grinding mouth, 7 specifications are optional. Meet your daily use needs. Material: borosilicate glass, with low expansion coefficient, high transparency and high chemical impact resistance, durable and reusable. Thick wall: This laboratory glassware adopts thick wall design, with uniform wall thickness, and is sturdy and durable. Easy to use: a two-piece vacuum cold trap, the upper and side pipes are connected by serrated hoses, and the frosted glass joint is convenient for sealing and replacement. Purpose: It is used to place between the experimental device and the vacuum source. It can be used as low temperature tank, pre freezing tank and low temperature container. › See more product details