Purple K fire extinguishers contain specially fluidized and siliconized potassium bicarbonate dry chemical which is particularly effective on Class B flammable liquids and pressurized gases. It is electrically non-conductive. Purple K has been the choice of oil, gas, chemical and utilities industries as the preferred firefighting agent. It features an aluminum valve with light-to medium-duty anodized aluminum valve body and an anodized aluminum handle and lever. It's equipped with dependable drawn steel cylinders, durable high gloss polyester powder paint and all-metal valve construction. Bilingual labels.