ERSA Pro Stringer Issue 3 - 2018 pro stringer 3 2018.indd - Kopie - Page 22 STRING TEST YONEX POLY TOUR STRIKE 1.25 STRING TEST The new POLY TOUR STRIKE is the new string born from Yonex brand. Projected and built to exalt control and extreme durability, the new co-polyester string has an external high density and low friction coating made to give the player high performance in terms of topspin production. We tested the 1.25mm 16L gauge string with our pro-