Genuine 4 Stone Arkansas EZ MiniHone Whetstone Knife Sharpening System with Silicon Carbide (Coarse), Soft (Medium), Hard (Fine) and True Hard (Extra fine) Stones 4" x 1/2" x 1/4" MIOB-44-T 4 Stone Model has Coarse (Silicon Carbide), Medium (Soft), Fine (Hard) and Extra Fine (True Hard) 4 stone sizes are 4 inches long by  inch wide by  thick Comes with one ounce of honing oil Genuine Arkansas stones are 100% quarried in the Ouachita Mountains of Central Arkansas Comes in plastic tube for easy storage when not in use