Tinned carbon steel core, no winding. Ball End.
Kaplan Amo strings have an advanced synthetic core, which produces a rich, powerful tone. Amo strings deliver warmth, richness and flexibility.

Features:

• Advanced Synthetic core produces a rich, powerful tone. 
• Provides warmth, richness, and flexibility for brighter instruments.
• Short break-in time. 
• Excellent bow response. 
• Superb playability. 
• Recommended for professional players. 
• Packaged in uniquely-designed sealed pouches providing unparalleled protection from the elements that cause corrosion.