CPR mask A cost effective resuscitation guard with oxygen inlet. One way valve with membrane to prevent cross infection, oxygen inlet can be connected to separate oxygen cylinder (not supplied) The case can be in other colors . ST-103 Pocket Face Mask Packing: 100pcs/ctn Dimension: 58 x 57 x 26 CM GW/NW: 12.5/10.5kgs CE ISO13485 approval. 2 quality level for choose