... Certificated2. Alloy metal stents, spray technology, very durable3. Stainless steel pressure monitoring gauge, the scope: 0-1Mpa, 0.05 scale readable.4 ... ~300 mL,300~2000 mL 9.Airway pressure monitoring:-20-100cmH2O10. Gas source gauge monitoring :0-1MPa11. Monitor:Inspiratory indicator,Expiratory indicator,Power ...