... " 2) Quality rubber inside, polyester fabric outside SpecificationsJumbo Tennis Balls, large tennis balls, giant tennis ball 9.5", 9'', 8.5'', 8", 7 ... '', 6", 5'',4" Free sample OEM welcomeJumbo Tennis Balls, large tennis ... balls, giant tennis ball 9.5", 9'', 8.5'', 8", 7 ...