Molten V5M4000-X Volleyball Properties: training model from the new V5M series meeting all FIVB requirements made of durable synthetic polyurethane leather made of 18 panels double-laminated butyl rubber bladder internal nylon reinforcement increases the ball's durability and maintains the appropriate air pressure size 5 circumference 65 – 67 cm weight 260 – 280 g Material: synthetic polyurethane leather Color: white-red-green