- A large bag for the pitcher's mound or on-deck circle.
- 100% genuine rock rosin in a big professional-style cloth bag.
- Imparts a tacky grip for enhanced gripping power.
- Includes a reclosable polybag.
- Rocks may be crushed into powder by placing bag on the ground and tapping it with the end of a baseball bat.

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Item #: ROSPRO

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