High performance active tip RT Ultra MIL-SPEC for heavy duty applications and largest components\n\n- RT Ultra Soldering Tips for WXUP Soldering Pencils\n- Made for high performance and heavy duty applications (LED soldering, Solar technology, Electronic components, Multi-layer boards, Large heat sinks, Hyper frequency PCB with a big dissipater)\n- Designed for heavy duty applications and large components\n- MIL-SPEC / IPC standard\n- Thermal Core Technology for optimized heat transfer