This is the Cookson Electronics Solder 0.70mm 500 g [TIND-WM 500] Features: Specification: Quality: High Tin: 60 % Lead: 40 % Rosin: Fluitin 1532 (until end 2012 approx.) Rosin: Fluitin XL-825 (from begin 2013 approx.) ...Contact us if you need more help.