Designed for use with a variety of Heater(R) Pitching Machines, including the Combo, Jr., Pro and 4-in-1, the Yellow Dimpled Pitching Machine Softballs are the same size and weight as a regular 12" softball for accurate game day simulation. The Heater(R) 12" Pitching Machine Softballs are made from durable, molded polyurethane for extended ball life and maximum performance. Features: Yellow 12" dimpled pitching machine softballs Same size and weight of a regulation 12" softball for accurate game day simulation Durable polyurethane molded construction for extended ball life Dimpled texture delivers a pitch with pinpoint accuracy Bright yellow color engages a player's vision and focus Designed for use with the Heater(R) Combo, Jr., Pro and 4-in-1 pitching machines Additional Details Includes 12 balls (1 dozen) per purchase Recommended for ages 8+ Manufacturer's warranty: 1 year