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      Product Specifications




      17 gauge / 1.25mm


      40 feet / 12.2 meters

      Item #


      Style #


      Item is returnable, but does not qualify for free returns.

      Tecnifibre Black Code 4S 17 1.25

      Built to deliver maximum spin, Tecnifibre Black Code 4S 17 tennis string will help you send the ball exactly where you want it to go with a square-shaped section. A unique production process delivers shock absorption and a reduction in vibrations. The combination of Thermocore technology and high density polyester creates high flexibility and tension maintenance.

      • PU multifilaments provide 22% less arm fatigue.
      • Official string of the ATP World Tour™.
      average rating 4.3 out of 5
      Based on 3 reviews
      • 5 Stars
        1 Review
      • 4 Stars
        2 Reviews
      • 3 Stars
        0 Reviews
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      100% of reviewers would recommend this product to a friend
      3 Reviews
      Rated 4 out of 5
      Review posted

      Got Spin??

      Delivered on time

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      Rated 4 out of 5
      Review posted

      Black code 4s

      It felt softer and spin was about the average, same as any other co-polys can give.

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      Rated 5 out of 5
      Review posted

      Excellent as always

      Strung these as mains at 54 and NRG 2 in crosses at 52 (my typical stringing). Center hits are powerful and control is outstanding. I can generate whatever spin rate is appropriate, whether for a low deep shot or abrupt cross court winner. Off center hits lack power (compared to TF Black Code). I might try upping the string tensions next time. By the way, I've been a huge fan of TF for a long time so please forgive any apparent bias.

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