ULTRA-THIN- the solder wire diameter is just 0.01inch, designed to solder the tiny component, just enough to add enough solder on those small MSD pads | LOW MELTING POINT- solder fast melting at 419F ( 217 Deg.C), suitable all soldering tools, easy for soldering, fast melting solder wire 0.3mm gauge | IMPROVED SOLDER- this 0.3mm solder wire contented alloy materials Sn99 Ag0.3 Cu0.7, provides excellent conductivity, eliminate soldering issue, reduce labor cost | APPLICATION- good for fine solder work, soldering for electronics equipment, connectors, whatever for electronics repair, diy, manufacturing or soldering study, this fine solder wire is good for use | LEAD FREE- Unlead solder, high performance for electric soldering project, unlead solder wire is good for use at home or office, 0.01 inch diameter solder wire is your right choice for small soldering