Dudley Thunder Heat USA 4A-147Y Fastpitch Softball - 1 Dozen in Yellow Size 12in. "Leather cover Polyurethane center with precision blended crosslinked polyurethane system High density and maximum resiliency Cover provides good feel and aesthetic appeal 12"" .47 COR Dudley Thunder Heat USA 4A-147Y Fastpitch Softball - 1 Dozen in Yellow Size 12in"- Dudley Thunder Heat USA 4A-147Y Fastpitch Softball - 1 Dozen in Yellow Size 12in.