This Kester brand 40/60 Rosin Solder is perfect for all your welding and soldering needs. The solder comes in a 1 lb container size and has a diameter of .062 core #66. Made in the United States, this solder is of great quality and is a must-have for professionals and DIY enthusiasts alike. The "44" Resin Core Solder is easy to use and provides a strong and reliable bond. Get your hands on this premium solder today and experience the ease of soldering like a pro.