☆ Mizuno Red Mark Sponge Tennis Balls, 12 balls. ☆ Part number: 60H-805. Size: Diameter 7cm, Weight: 15g. ☆ Used for about 1 hour indoors by a sponge tennis circle. I have sorted them and removed the ones in poor condition, and have done some basic cleaning. I think they can still be used for sponge tennis practice. ☆ I think they are good for children's tennis practice and also for baseball toss batting. ☆ This is an item from a club, so I cannot offer a discount. ☆ Shipping will be by regular mail. There are no smokers or pets.