Strings are plain steel and round wound nickel-plated steel. Ball end, regular length (R8" winding). Gauges 010 012 014 022w 010. Sealed in corrosion-free "NitroPack" packaging. The gauges on the web image and on the packet are incorrect. The correct gauges are above. GHS only makes the one set with ball-ends. The wound string is an electric guitar string.