The ljhnba Durability Table Tennis Ball Protective Case is an innovative solution for protecting your favorite balls on the go. Its compact design allows you to store four 40mm balls or five 50mm balls securely inside its secure hook compartment. The transparent hard storage box on the top level provides a convenient place to store table tennis equipment, paddles, or rackets. The case also includes a transparent clear keyring case, making it easy to keep your keys organized and always accessible. Made from high-quality, impact-resistant polycarbonate plastic, the ljhnba Durability Table Tennis Ball Protective Case is designed to withstand daily use and provide long-lasting protection for your table tennis balls.