Wilson Slam JR 21 Boys TNS RKT 3 1/2'' Tennis Racket, Navy Blue-Orange WR172010U Properties: The Wilson children's racket is perfect for recreational tennis games. AirLite Alloy technology creates a lightweight and durable construction. Aluminum construction. Technical data: Age: 5/6 years or height 104-117 cm Handle size: L0 (3 1/2) Material: aluminum Racket weight (unstrung): 171 g Racket length: 53.3 cm - 21” String pattern: 16x18 in Balance: 25.8 cm Head area: 593 cm² / 92 in² · Wrap: factory Factory tension: yes