The soldering iron tips are applicable for MT-100 HT-1937 butane gas soldering iron kitThe soldering iron tips fit for plastic ,sponge cutting, electronic foot welding.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.Easy to use and portable to carry colour:Gold + silverMaterial:metalPackage Contents:3* soldering iron head1* sponge knife1* plastic special knife1* heating coreOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.