Coil packing made of PTFE fiber yarn, processed with PTFE dispersion, then woven into a square cross section. Being made of 100% PTFE, this refuses to almost all liquids. So, this is most suitable for seal seals using a shaft valve to handle corrosive liquids. When low torque or gas sealing properties are needed, use the following product treated with lubricating oil: No. 7233 (O) for general gas-based liquids No. 0.7233 (FO) for combustible gases such as oxygen and ozone. It complies with the Food Sanitation Law, and the Regulations on Food & Additives.