Pentagonal cross-section increases spin and feel for advanced play
Co-polyester core enhances durability and reduces premature breakage
Flexible polyester construction provides more elasticity and pop
Larger sweet spot minimizes risk of off-center hits
ATP Tour official string for professional-level performance
Summarized by Shop
Spin and forgiveness, softer on impact FLEXIBLE, TOLERANT, SPIN.
Tecnifibre BlackCode is a 3rd generation polyester string with a pentagonal cross-section and a co-polyester core for ultimate durability.
Functional Benefits:
More FLEXIBLE – less shock on impact compared to 2nd generation polyesters
![Razor Code 1.25MM/17G Tennis String Blue-Strings-Tecnifibre-39237-DEFAULT-L-1-[Sku]-Tennis Express](https://cdn.shopify.com/s/files/1/0887/5599/4939/files/39237-DEFAULT-L.webp?v=1769461755&width=256)
