Petromax Mantle HK150 The new Petromax Helox mantle has an excellent light efficiency and presents itself in the elegant Petromax-design. Thanks to its tear proof laces, the fine-meshed Helox mantle can be very easily fixed to the burner. The U-shaped single-hole mantle operates so that the mantle does not come into contact with the carburettor the first time you will flame it. The Petromax Helox mantles are asbestos-free and non-radioactive.