NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit Tumbling Grit Media

This grit is perfect for use with rock tumblers of any brand! Take your stones from rough rocks to polished gemstones in just 4 easy tumbling step using National Geographic’s Grit Refill (Rock tumbler required and sold separately). This product contains 4 stages of grit in easily resealable containers – enough for about 8-10 pounds of rocks.