Infeld bass: Infeld bass strings deliver modern tone, with balanced spread across the frequency spectrum. They communicate in a full, well-rounded bass, throaty mids and solid treble without brittleness. Since the outer layer of windings is superalloy, the warm tone is retained. Plus, they are easier on your fretwork than stainless or allsteel strings.
Powerbass: The combination of Thomastik-Infeld’s powerful Magnecore winding wrapped onto an extremely flexible steel hex core give this set unmatched clarity and transparency while maintaining maximum output. Carefully researched tension and gauging wound on microprocessor controlled machines ensure string to string balance.
Jazz Roundwound: This unique sounding string has a construction very similar to it’s flatwound counterpart but with slightly more edge. The round outer-wrap is a small diameter nickel alloy winding which adds slightly more bite to the upright style tone without the typical roundwound side effects of excessive string squeak and premature fret wear. The set is designed with a lower tension and gauging to increase ease of playability and reduce strain on the instrument’s neck without sacrificing output. 
Jazz Flatwound: Nobody knows flatwound bass strings better than Thomastik-Infeld. SPIROCORE strings by Thomastik-Infeld have been legendary among upright bassists for decades. Now the electric bassist can also experience the Thomastik-Infeld sound. Thomastik-Infeld utilizes a highly pliable steel core which is wrapped with a silk inlay. The outer winding is a true ribbon flatwound constructed of a special nickel alloy. The result is an incredible depth of tone and an enhanced fundamental which is unavailable from any other flatwound.
Acoustic bass: Ideal for acoustic bass guitars and piezo­electric equipped solidbody basses. This set has a phosphor bronze round wound winding around a nylon core which produces a smooth, organic, upright bass tone.