Infeld "Red" The red and blue game strings can be combined to change the character of the sound without changing the tension of the strings. The red series enhances the dark sound of the instrument, the blue supports the brilliant sound . With Mi rope in chrome plated steel, gold plated Composite soul = hybrid 4/4 Mi: Steel, Gold Plated, Tension 8.0kg / 17.6lbs Hydonalium yarn (Alloy Alu, Magnesium, Manganese), Tension 5.5kg / 12.1lbs Hydonalium Spun (Alloy Alu, Magnesium, Manganese), Tension 4.6kg, 10.1lbs Floor: silver yarn, tension 4,7kg / 10,3lbs String tension of the game: 22.8kp / 50.1lbs