DESC: Add brightness and warmth to your tone with Sunbeams. Gauges 45-65-85-105.Sunbeams are roundwound nickel-plated bass strings with round-core construction. These bass strings are perfect for traditional as well as fretless players wanting more brightness and warmth. Sunbeams feature the easily recognizable feel and flexibility of DR round-core construction with nickel warmth, softness of feel, and increased response to magnetic pickups due to the sensitive magnetic content (compared to stainless steel) of the nickel-plated wrap wire.