NEW CRYSTAL: New STABILON fibre for the core, new computer-based technology and even more accurate automated checks during manufacturing have further enhanced the characteristics of the popular CRYSTAL range. ;Larger overtones, fast and more accurate response;Quality sound projection from pianissimo to fortissimo;D Stabilon-Nylon/Silver wound;medium-light 4.25kg/9.38lbs;medium 4.45kg/9.82lbs;forte 4.75kg/10.49lbs;