☆Reasonable Price☆ Mizuno Black Mark Sponge Tennis Balls, 6 pieces. ☆Product number: 60H-803, size: 7cm diameter, weight: 15g. ☆Used for about 2-3 hours indoors in a sponge tennis circle, but there are some frays, etc. Simple cleaning has been done. ☆Good for children's tennis practice, and also for baseball toss batting. ☆Shipping is by non-standard mail. No smokers, no pets.