Tecnifibre Tennis String Thermocore 4S - Black - 1.30 - Polyester

The 4S string is engineered to deliver exceptional spin, offering the highest level of effect in its range thanks to its precise square construction. Built for heavy hitters and advanced players, it provides explosive spin potential while maintaining the trademark Tecnifibre balance of performance and comfort. Designed with high-quality co-polyester and manufactured in France, the 4S string ensures durability, flexibility, and optimal feel for players who demand extreme spin without sacrificing playability.

Key Features

• Maximum spin generation with square-section construction
• Ideal for advanced, demanding players
• Excellent for heavy lifters and topspin-focused playstyles
• Durable co-polyester composition for long-lasting performance
• Thermocore technology for improved flexibility and reduced fatigue
• Designed for rackets over 300 g and heavy string breakers
• Black color for a sleek and modern aesthetic
• Made in France

Specifications

• Type of String: Monofilament
• String Range: 4S
• Packaging: Set 12 m
• Color: Black
• Main Material: Co-polyester
• Section: Square
• Recommended Tension: 22–25 kg
• Maximum Tension: 32 kg