The Peter Infeld (PI) violin strings from Thomastik-Infeld are designed for discerning players who take pleasure from the strings distinguished ability to produce complex tones, power and elegance as well as a high dynamic range.  PI strings produce a rich spectrum of sound colors, the perfect blend of power and elegance, and a wide dynamic range. The strings deliver instant bow response as well as superior tuning ability. The soft left hand feeling brings out the best in you and your performance.  Full Size Only Medium Gauge PI 100 Set E - Chrome steel /  Platinum Plated / Removeable ball end A - Synthetic Core / Aluminum Wound D - Synthetic Core / Silver Wound G - Synthetic Core / Silver Wound PI 101 Set E - Chrome steel /  Tin Plated / Removeable ball end A - Synthetic Core / Aluminum Wound D - Synthetic Core / Silver Wound G - Synthetic Core / Silver Wound