Wilson Ultra Power Junior 21 3 1/2 WR118910H tennis racket. The Head children’s racket is suitable for recreational tennis matches. AirLite Alloy technology creates a lightweight and durable construction. AirLite Bumper technology provides lightweight head protection. Stop Shock Sleeves technology reduces string vibrations. C-Beam frame oval cross-section offers more power to hits and improves stability. Aluminum construction. Includes a 3/4 zippered cover with an adjustable strap. Technical data: Age: 5/6 years or height 104-117 cm. Grip size: L0 (3 1/2). Material: aluminum. Racket weight (unstrung): 178 g. Racket length: 53.3 cm – 21″. String pattern: 16×16 in. Balance: 24.5 cm. Head size: 581 cm² / 90 in². Factory grip: yes. Factory stringing: yes. 3/4 cover included: yes.