This product is consist of Spike,Air vent,Drip chamber,Liquid filter,PVC tube,Flow regulator,Regulator wheel,Flash bulb, Taper fitting,Luer lock Hypodermic needles(or Scalp vein sets). ect. Description of product: 1.Sterile by E.O gas, non-toxic and pyrogen-free. 2. Only for gravity infusion. 3.This product is suitable for clinical vein infusion use. 4. The expiry day will be 3 years. 5. The products are used to transfer medicine solution to human body. It is sterile, non-toxic, non-pyrogenic and easy to use. 6.This product could prevent infectious disease and avoid cross-infection effectively.