Includes Eight ounces (226.8g) of Semi-Precious Rough Rock, and one packet each of: Coarse Grit, Medium Grit, Fine Grit, and Jewelry Accessories. Natural Science Industries designs the most creative, innovative and fun products available on the market. This will keep kids and parents interested in science. Not only are the products educational, they are also loads of fun! For ages 10+. Availability: Usually ships the next business day. NSI Rock Tumbler Refill 00602Regular price: $12.95Our price: We can be reached at (814) 371-2244 Monday through Friday from 11 AM to 5 PM EST. Or you can email us at info@mytoyheaven.com. We offer FREE SHIPPING on orders over $119.00. This applies only to UPS Ground shipments to the 48 contiguous states. At this point in time, we are only shipping within the 48 contiguous states.