... ,ensuring the airtightness of door. Airproof door Gas-tight door ,operating room door,automatic operation room doors,medical door, Made in Guangzhou,China. ... inward.It usually be used as hospital operating room door, ward door, clean room door, Lab, and other place need dust proof ... Steel. Color Original Stainless Steel color2, Infill a, PVC Foam b, 60mins fire rated Bolivian Magnesium Boar.3, ...