Diadem Premier 40 Outdoor Pickleballs 3 Pack Pickleball Balls : Diadem Premier 40 Outdoor Pickleballs offer an accurate bounce and long-lasting durability. Made with high quality PET plastic, these pickleballs are perfect for training. Diadem's proprietary formula and laser melt construction lasts three times longer than ordinary pickleballs. Neon Yellow for easy visibility.