50w, resistive ceramic stack. Replace heap elements. Material: Ceramic Voltage: DC 24V Heat resistance: 3.0-3.6 Ω Temperature resistance: 50-58 Ω Length: 58mm ± 1mm Diameter: 3.70mm-3.80mm Suitable for HAKKO welding stations, welding torch samples: 936/937/938/956/907/908/913/914 as Usage tips: Various heavy cores with iron handles are not common, Because welding is not at the same stage of the circuit, The wrong welding station will be used, please note The package includes: 1 Head Core Presentation