 Gauss Rifle Kit Includes: 2 Wooden dowels, 16 inches long and ⅜ inch diameter 4 Super Strong Neodymium magnets, ½ inch thick and ½ inch diameter 10 Nickel-plated steel balls, ½ inch in diameter Want to customize your Gauss Rifle? Visit ScienceKitStore.com and search for "Steel Balls" or "Neodymium Magnet". Watch Gauss Rifle Video! |