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Open Cuff Anesthetic MaskProduct DescriptionComply with ISO 5365-1 standards.Pass biocompatibility test.Product  featuresErgonomic shape design.The mask is designed according to human engineering,Website:http://www.bqplusmedical.com, then it only needs smallest pressure and then reaches a seal over the face. The doctor can operate it by single hand. Safe & Green MaterialBQ+ Mask is made of Medical Grade PP & TPE, contains no PVC or Latex, it will protect patient’s safety and also the environm