The Wilson 11″ Fast Pitch Softball is designed for ages 11 and under. ASA ™ approved.Fast Pitch Junior Olympic Girls. SST(tm) Super Joint innovation is Patented. 20% greater than conventional raised seams offers pitchers exceptional control on the mound and assists fielders find the ball quicker in the glove and toss with more accuracy.The cover is Frequency Matched Optic Yellow ™ Leather with Red stitches with a specially created finish to give optimum brightness and residual tack. Compression Controlled Cork center is exclusive to Wilson (r) which uses standard feel and performance at a competitive cost. COR.47 max. COMP: 375 lbs. max.