Weller EL99/1-250 electronic solder with a 1 mm diameter on a 250 g spool, lead-free solder. It is suitable for all soldering work in electrical engineering, miniaturization, and on printed circuit boards. S-Sn99Cu1, DIN EN 29453 (Sn99.3Cu0.7). 2.2% flux according to DIN EN 29454, 1.1.2.B (EN 6190-ROM1). - Lead-free - Wire Ø: 1.0 mm - Spool size: 250 g