MSV Heptatwist is similar in feel to Focus Hex but is seven sided and twisted to impart even more spin. Very similar to Solinco's Barb Wire. In black in both 1.20mm and 1.25mm.

$22

MSV Focus Hex . German made string and as the name implies the string is hex shaped for added spin potential. Excellent tension maintenance for a polyester string and not bad in the comfort dept either. Available in 1.10 and 1.18mm

$22