Precision blended cross-linked polyurethane system
High density and maximum resiliency
Synthetic cover provides a nice feel and aesthetic appeal
Seams: Flat
COR: 0.44
Compression: 375 lbs.
If your game is slow pitch softball, then your ball is the USASB Thunder SY Polycore Softball. Deliver your best game with the best ball in softball construction.
![](http://unitedsupplycorp.com/modules/search/fancy_modal_img.php?screen_sku=4A921N&screen_title=12" Usasb Thunder Slowpitch Softball - 12 Pack&screen_single_image_enlarged=//unitedsupplycorp.com/images/Dudley/650/4A-921N_ThunderSY.jpg&screen_single_image=//unitedsupplycorp.com/images/Dudley/650/4A-921N_ThunderSY.jpg)
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