As the name suggests, $sku$ is the box type air purification negative pressure safety device that designed to prevent aerosol release with some hazardous or unknown biological particles. It offers a safer environment for colleges, bio-pharmaceuticals, third-party testing, and other scientific and research labs. It mainly consists of the air filter system, the exhaust bellow system, the front window slide is driven system, and the control panel. All its ergonomic and intelligent designs are intended to ensure maximum personnel, product, and environmental protection. It is the most essential safety protection equipment of laboratory biosafety’s I protective barrier.