This spool of solid-core wire is easily soldered to and can handle up to 200°C and 600V. We like this wire because it's flexible but also holds its shape. We love the sturdiness and reliability for prototyping and use these all the time in breadboards, perfboards, and in terminal blocks.
Comes with one 25ft spool of gray wire. The wire is 22AWG solid-core with an outer diameter of 1.6mm.