Premium Transparent Plastic Vacuum Desiccator with Double Vacuum Valve & Pressure Gauge - Laboratory-Grade Airtight Seal for Anti-Oxidation | Ideal for Research Labs, Graduate Studies & Chemical Storage

【Product advantages】 *No need to use sealing grease. The upper and lower parts of the container are sealed with high-quality silicone rubber O-rings, and the top of the container is a flat retainer, making it easy to hold. When the plug seal is installed on the top, it can be stacked stably in conjunction with the annular protrusion on the bottom. *The valve core is precision processed from metal materials, and the air intake flow is gradually and stably adjusted from small to large. *After the needle valve is tightened with a little force with your fingers, the air leakage will be zero under one atmospheric pressure. *Two needle valves are installed at the same time, one for vacuuming and one for introducing inert gas to achieve vacuum preservation in an inert gas atmosphere. 【Product parameters】 Product name: Plastic vacuum dryer Product material: Polycarbonate Product color: transparent Product specifications: 150mm, 250mm, 400mm