New ZN HardCore Softballs are carrying 15'-20' farther than classic ZN's! 
- The GSL Thunder Hycon slowpitch softball is manufactured with a unique gluing process that bonds the cover to a poly core 
- Precision blended cross linked polyurethane system improves ball durability, reduces bat damage and reduces bat vibration “sting” on contact 
- The covering is composed of quality optic yellow composite with black stitching. 
- .44 COR 375 Compression 
- 4GSL12H