12 Pieces (one Dozen) Leather Batting Practice Baseballs Cowhide Brand New Base Balls9" baseballMade from High Quality Leather.Red stitching detailRubber and sponge coreVersatile for use in any type of play1 piece in in one Plastic Blister Packing Throwing a weighted baseball is a great way to integrate overload and under load throwing throughout your pitching training. Whether its in catch play, command work, or pull downs, a leather weighted baseball set that more closely mimics the feel of a competition ball elevates your training. The 6 different weights allow the athlete to consistently progress their training by throwing light and heavy baseballs. The set includes the following white leather weighted baseballs: Lettering and seams are unique by ball for easy identification. 5 oz. Baseball – Black Lettering and Seams