The soldering iron tips fit for plastic ,sponge cutting, electronic foot welding. The soldering iron tips are applicable for MT-100 HT-1937 butane gas soldering iron kit that has fast conductivity. The welding tools are both iron and gold plated which are anti oxidized, ensuring long-lasting use. This soldering iron tip is easy to take and clean., Weight: 0.11904962148 Pounds, Manufacturer: Remingtape