Raw materials:

1. Be made from odorless medical grade PVC, to be light and more comfortable

2. Be with white transparent and green transparent colors while transparent plastic mask makes it be visible, allowing care providers to be better monitor patient's conditions instantly

3. Both 'with DEHP' and 'DEHP free' types are available for options, while 'DEHP free' type is trended to more and more widely used

Oxygen tube:

1. Normally 2m or 2.1m tube is configured

2. Star lumen designing to minimize risk of airflow termination when it's kinked

3. Be with luer slip (conventional) connector and luer lock (universal new type) connector, while luer lock connector is designed for more tightly connection with central oxygen supplying system in hospitals

Face mask:

1. Ergonomic designing facilitates full covering and enable sufficient inhalation of nebulized drugs

2. Adjustable nose clip makes comfortable fitting and prevents nondirective moving

3. Good edge curling

4. Thickened hole prevent break of face mask edge when being elastic strap is being pulled

1. Can be with white transparent color or green transparent color
2. Different oxygen diluters are selected for different oxygen concentration