This is a spool of Rosin Core Solder of 4 oz.

This solder is not only great for hobby projects but good all electrical applications. The melting temperature for this solder is 374 degrees Fahrenheit.

Key Features:

• Designed For Electrical & Electronic Work
• 60% Tin, 40% Lead
• .031 Diameter
• Melts at 374° F
• 4oz Spool