D'Addario Helicore H312 Violin Strings, 4/4 Size, Medium Tension, Aluminum Wound. - Brand: D'Addario - Model Name: Helicore H312 - Size: 4/4 - Tension: Medium Tension - Material: Aluminum Wound Thank you for looking. Helicore A string, 2 pieces Old packaging - Brand: D'Addario - Model: Helicore - Instrument Type: Violin - Size: 4/4 - Tension: Medium - Model Number: H312 4/AM Thank you for looking. I have other items listed, so please comment if you would like to combine or change the set. It is also possible to increase the number of strings. Violin Strings *Please understand that this is stored at home by an amateur. Thank you.