Novak Solder - Silver 15g Lead Free This is Novaks Lead-Free Silver Rosin-Core Solder. It contains 15 grams of solder, which is approximately 10 feet (3 meters). The solder is conveniently stored inside a clear plastic tube to prevent unrolling and has an opening at the top for easy access. It is the same solder that Novak uses in its electronics. It is environmentally friendly and specially formulated for hand soldering. It contains 3% silver for high-conductivity, low-resistance and for strong solder joints at a relatively low melting point. Meets RoHS compliance standards.