The Wilson 11″ Fast Pitch Softball is designed for ages 11 and under . ASA ™ approved.Fast Pitch Junior Olympic Girls. SST(tm) Super Seam technology is Patented. 20% higher than conventional raised seams gives pitchers superior control on the mound and helps fielders locate the ball quicker in the glove and throw with more accuracy.The cover is Frequency Matched Optic Yellow ™ Leather with Red stitches with a specially formulated coating to give maximum brightness and residual tack. Compression Controlled Cork center is exclusive to Wilson (r) which offers traditional feel and performance at a competitive price. COR .47 max. COMP: 375 lbs. max.