The Weller T0051403099 WSW SnPb L1, 1,0mm, 100g is designed to enhance the quality of all your soldering jobs, Weller‘s WSW line of solder increases productivity, and optimizes your soldering performance. The T0051403099 reduced splash feature increases safety and enables you to have a cleaner work area. With a guaranteed 100% continuous flux core, combined with pure first metal melting, the T0051403099 enables long-term, highly durable solder joints without cracking, even on difficult surfaces.