Dudley WT12YFP 43147 NFHS Thunder Heat Fastpitch 12" Softballs (Dozen)The Dudley Thunder Head NFHS softballs are great for any team looking for a premium softball. The exceptional construction has exceptional compression and allows players to deliver fast pitches and accurate throws. Features: 12" NFHS Approved Fastpitch Softball Poly center, raised seams, and a leather cover that provides improved grip and protection Precision blended crosslinked polyurethane system High density and maximum resiliency COR: 0. 47