Material：2-ply paper + 1-ply poly film or 1-ply paper+ 1-ply poly film
Storage: Stored in dry, humidity below 80%, ventilated, non-corrosive gases warehouse
Sterilization:Sterilized by ethylene oxide
Shelf time : 5 years
Sterilization:Sterilized by ethylene oxide
Shelf time : 5 years