Nippon Seisen is only one company of the world who can produce all metal gas filters by itself from the raw material for the media to finished products. “NASclean”, the all metal and PTFE media gas filter for use in semiconductor, LCD, or Solar manufacturing process, utilizes “NASLON” short fiber powder and combines innovative capabilities enabling the removal of particles down to 0.003 microns in size, with superior gas replacement characteristics. NASclean also has PTFE media models. Nippon Seisen also provides heaters for the industry called “Naslon heater” with flexible Naslon Stainless fiber manufactured by Nippon Seisen itself as the raw material.