Felder Solder Solder, lead-free 627229 - Felder 5551941030, Felder ISO-Core "Ultra-Clear" Sn100Ni+, a lead-free soldering wire, typically used for reliable electronic soldering. This solder contains a composition of Sn99.25Cu0.7Ni0.05 and is presented on a 0.500 kg reel with a 1 mm diameter, ensuring excellent performance. Ideal for environmentally-friendly applications, its precise formulation provides efficient and clean soldering results. Felder 5551941030 ISO-Core Ultra-Clear Lead-Free Solder 0.500kg 1mm