Thunder Heat Softball...High Visibility! Dudley Thunder Heat Fast Pitch Softball features: 3 Models: Composite Cover A* Leather Cover A* Synthetic Cover Composite: Offers long-lasting performance Leather: Highly durable and provides great look and feel Synthetic: Provides good feel and aesthetic appeal High density polyurethane center with maximum resiliency Fastpitch softball with Red stitch Compression: 375 lbs, .47 COR Available by the dozen only Color: Yellow Size: 11" A* 12" Dudley...An Official & Durable Softball!