The Roddick Junior is geared toward younger children (ages 8-9) than the Junior 145. The large head is perfect for increased chance of those sweet-spot hits that will boost a young competitor’s confidence. Like the 145, the 140 is flexible enough to ensure maximum control. Vibration-buffing technology called Woofer also protects young arms from future arm injuries like tennis-elbow. Specifications: Headsize: 105 in Weight: 8.6 oz Length: 25 in. Grip Size: 4"