What string does Miomir Kecmanovic use?

This kid is a consistent beast, I love his playing style. I was wondering if anyone knew what string he uses in his Pure Aero? I can't seem to find that info online.
 
Ganz sicher - durch die Umlenkung und die Reibung in den Ösen werden die Spannkräfte gehalten.
Absolutely safe - the clamping forces are held by the deflection and the friction in the grommets.
 
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