This boat shape stone is made of first grade quality material, high temperature and 18-24 hours Constant temperature baking, sharpeness, hardened and high quality for long time use.Products Features:made of high quality material#60-#12000 can be customizedSharpeness, hardened and quality for long time use.Boat-shaped, combination sharpening stone.Art No.SizeGranularity Qty/Inner box Qty/Ctn 4090088"/200mm#60-#12000 1PC 100pcs4090099"/225mm#60-#120001PC 100pcsWelcome to inquiry and order. For more production information, please contact or mail. Our professional customized high quality stone will be provided to you with guarantee and exccelent service.