Issue link: http://itf.uberflip.com/i/450983
24 Brand and Ball name Country of origin Address Code Tretorn Classic (pressureless) Thailand 39 Tretorn Plus (pressureless) Thailand 39 Tretorn Pro Lite (pressureless) Thailand 39 Tretorn Rothenbaum Thailand 39 Tretorn Serie+ Thailand 39 Tretorn Serie+ Control Thailand 39 Tretorn Serie+ Germany Thailand 39 Tretorn Tournament Thailand 39 Tretorn XL II (pressureless) Thailand 39 Wilson Australian Hopman Cup Thailand 41 Wilson Australian Open Thailand 41 Wilson Championship (pressureless) Thailand 41 Wilson Championship All Court Thailand 41 Wilson Championship Extra Duty Thailand 41 Wilson Championship Extra Duty (2-ball) Thailand 41 Wilson Championship Regular Duty Thailand 41 Wilson Championship Silver (pressureless) Thailand 41 Wilson Federer LTD Thailand 41 Wilson Silver Championship Thailand 41 Wilson Team Practice Ball Thailand 41 Wilson Tour All Court Thailand 41 Wilson Tour Green Clay Thailand 41 Wilson Tour Red Clay Thailand 41 Wilson Tour Club Thailand 41 Wilson Tour Davis Cup Thailand 41 Wilson Tour Germany Thailand 41 Wilson Tour Premier Thailand 41 Wilson Tour Standard Thailand 41 Wilson US Open Extra Duty Thailand 41 Wilson US Open Extra Duty (2-ball) Thailand 41 Wilson US Open Extra Duty (CTS) Thailand 41 Wilson US Open Extra Duty Swiss Tennis Thailand 41 Wilson US Open Regular Duty Thailand 41 Wilson US Open Regular Duty Grass Court Thailand 41 Wilson US Open Regular Duty Grass Court (white) Thailand 41 Yonex Muscle Power Tournament Thailand 42 Yonex Team Taiwan 42 Yonex Tour Thailand 42 Note: These balls are not pressurised balls. The balls are filled with a micro-cellular material that is designed to replace and simulate the effect of the increased internal pressure of a pressurised ball.