Blue Marble National Geographic Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media, Polish Up to 9 kg of Rocks, Works with Any Rock Polisher, Tumbler Supplies

HIGH QUALITY - This rock polisher grit refill pack comes with enough high-quality silicon carbide grit to put a dazzling polish on up to 9 kg of rocks, gems, glass, and more EASY TO USE FOUR-STAGE ROCK GRIT - The first rock tumbling grit stage provides initial shaping, the second smooths rock surfaces, the third pre-polishes rocks, and the fourth provides the final polish COMPATIBLE WITH ALL TUMBLERS - This complete 4-step tumbling grit refill kit works with all rock polishers. For best results, use with National Geographic tumblers and rock tumbling supplies EASY TO MEASURE AND STORE - Each rock tumbling grit stage is packaged in a wide-mouth container with secure, screw-top closure HIGH-QUALITY EDUCATIONAL TOYS - We're proud to make the highest quality hands-on science toys, and all our products are backed by exceptional service. If your experience is less than stellar, let us know and we'll make things right!, Manufacturer: National Geographic