Petromax P501 Z HK500 Double Tie Mantles for use with Mantle Support kit. Highlights & details. Set of 5. Description. For operating the Petromax with support bracket. They are characterised by their long lifespan & their good quality. Original Pelam gas mantles are free of thorium & asbestos. As compared to the gas mantles of the other manufacturers the Original Pelam gas mantles are thus not radioactive.