With Nude/Transparent Polycarbonate, All Fire Extinguishers and Fire Extinguishing Sprays of metal/aluminum will be replaced. As Pressure containers, Polycarbonate has following characteristics and as Nude, transparent, visitble, see-through from outside;;;;; Polycarbonate Cylinder*™*(PC)™ Polycarbonate Cylinder*TM* for Pressure-Containers can be used for Fire Extinguishers, Aerosol Sprays for insect killers, Hair Sprays or Topics and also for Spray(Aerosol) Types of Fire Extinguishers; Main Characteristics of Polycarbonate: a. Transparent/Nude/Visible/Clean b. Strong enough for +140C -60C c. Weather-resistant d. Impact-Resistant e. Heat-Resistant f. UV Sustainable g. Engineering Plastics from GE, Dow-Chemical, Buyer h. Tested in Aero-spaces by Astronaut Mr. Amstrong in the Moon. i. Newly improved by Lexan Calibre and Mikarlon