Oxygen Mask with Reservoie Bag Oxygen Mask with Reservoir bagMade of medical grade PVCReservoir bay with/without check value One safety vent open.Mask with elastic strap,Adjustable nose clipNon-rebreathing Mask provides a high concentration of oxygen with 2m tubing,Size: S, M, L, XLPacked in individual PE Bag100pcs/ctn,Dimension;47*39*25CM GT010-160 Oxygen Mask with Reservoie Bag