• Ball Specifications: Each ball weighs about 0.81 oz and has a 2.9 inches diameter
• Compatibility: Only suitable for Furlihong 380BH 388BH baseball pitching machine (may not work with other brands)
• Material: Made of plastic, will not damage bats. Recommended to use a plastic bat for practice
• Surface: High friction surface for improved performance
• Pack Quantity: 20 pcs per pack