Gray PVDF fittings exhibit the same physical and chemical resistance properties as Natural Kynar. PVDF fittings contain recycled runner material produced during virgin material, Natural Kynar production runs. For applications that do not require lot traceability or a material that meets USP Class VI requirements, PVDF fittings represent an excellent value. Temperature Range -80 °F to 226 °F (108 °C). Pressure 260 psi at 70 °F.