Indium 52736-0454 Wire 60/40 RA .015 in. 1/4 lb spool Sn60Pb40 (60/40) 0.015" (0.39mm) Diameter CW-201 Series RA (Rosin Activated) Flux 2.7-3.2% Core Size 1/4 lb Spool, 3 year shelf life (&lt;26C & &lt;60% RH). Made in the USA