Kester 275 No Clean Flux Solder Wire - 0.023 in Wire Diameter, 1.10 lb, Sn99.3% Cu0.7%, 92-9574-7619 Brand: Kester / Made in USA Composition : Sn99.3% Cu0.7% Series: 275 / K100LD Weight : 1.10 lb / 500g Wire Diameter : 0.023 in / 0.8 mm