Check the listing for details. D'Addario Kaplan Golden Spiral Solo Violin E String 4/4 Solid Steel Light Ball. Color: 4/4 Size Solid Steel, Condition: New. Listed at 5.99 USD. Kaplan violin E strings provide the traditional rich sound expected from high-quality steel strings. Multiple options are available within the Kaplan line for a wide array of performance needs, including plain steel and aluminum wound. Scaled to fit 4/4 size violin, Kaplan strings provide the traditional rich sound expected from high-quality steel E strings.Multiple options are available for a wide array of performance needs, including plain steel and aluminum-wound, in ball-end and loop-end varieties. Light strings allow for an easier bow response. Medium strings are optimized for the needs of most players. Heavy strings allow for greater projection and volume potential while extra-heavy strings allow for even more.