Product Description High Quality & Customizable DSM-300 Automatic Hermetic Door Operator Product Advantage It adopts unique high-tech, good sealing, prevents cross-contamination, maximizes cleanliness, and air-tightness meets the standard requirements of the automatic airtight door industry standard JG/T257-2009. The door body is firm and thick, quick opening and closing, and the air circulation is reduced to a minimum, which can prevent dust from entering the place where there is clean demand, and maintain constant humidity and constant temperature. The overall operation is light and peaceful, and the indoor and outdoor sound insulation effects are good. The external airtight door is directly mounted on the wall and is quick and easy to install.