High Temp Silicone Coating. Close Tolerance, Low TCR. Non Inductive Versions. Approved since 1977 to JSS 50402. High Surge Version Available. Meets CECC 40201 Specs. PEC Resistors are RoHS compliant. https://peccomponents.com/product/10-silicone-coated-radial-tubular-power-resistor-ppr?search=