Iso-Tip 7971 SolderPro 50 Butane Soldering Iron. Our Pro Industrial Chisel Butane Tip has a length of 2.4mm or. 094″. Iso-Tip 7566-100 Soldering Tip, Micro, Cordless, 0.4mm. We are not responsible for examining or evaluating the content or accuracy and we do not warrant and will not have any liability or responsibility for any third-party materials or websites, or for any other materials, products, or services of third-parties.