Diadem SG Ultra Tennis String Reel ? 660ft Synthetic Gut for Control Comfort The Diadem SG Ultra Tennis String Reel is your go-to synthetic gut string for exceptional feel, durability, and affordability. Designed with a soft nylon core and innovative construction that resists fraying, SG Ultra is ideal for beginners and intermediate players who want to swing confidently without sacrificing control. Perfect as a standalone string or in a hybrid setup with co-polys like Diadem Flash or Pro X, or nylons like Impulse and Evolution. Its low stiffness rating allows for standard tension use, delivering remarkable touch and playability without the harsh feedback. Key Features: Soft Synthetic Gut Design: Enhanced feel and comfort at an affordable price Fray-Resistant Construction: Increases durability for long-lasting performance Player-Friendly Nylon Core: Great for developing players taking bigger swings Versatile Hybrid Compatibility: Pairs well with co-poly and nylon strings Low Stiffness: Ideal for maintaining control and comfort at standard tension Specifications: Length: 660 feet / 200 meters Type: Synthetic Gut Colors Available: Black, Natural Gauges Available: 17 (1.25mm) 16 (1.30mm)