Soft tennis uses an inflatable, soft, rubber ball whoseperformance can be altered depending on air pressure
It moves slower than standard ball, which lengthens rallies andmakes it easier to keep on court
Ball size : 2.600 to 2.680 inches
Ball weight : 55.0 to 60.0g
Rebound : 53.0 to 59.0 inches
Through Authenticate 
