Feature 1Premium Material: Knife sharpening stone is made of premium white and brown corundum for effective sharpening and improved tool performance. 2Base and Angle Guide: Knife sharpening stone has a built in base and angle guide to simplify the sharpening process and ensure a consistent blade angle. 36 Sizes: The knife sharpening stone is available in 6 different sizes to meet the needs of all kinds of knives. 4Practical to Use: The knife sharpening tool is easy to use and restores the sharpness of the knife's edge with ease. 5Easy Cleaning: Knife sharpening stone is durable and easy to clean, no need to change sharpening stone frequently for long time use.Item Type: Knife Sharpener StoneMaterial: White Corundum, Brown CorundumWeight: Approx. 380g/13.4ozSize: Approx. 150x20x7mm / 5.91x0.79x0.28in 180 Grit, 400 Grit, 800 Grit, 1500 Grit, 2000 Grit, 3000 GritQuantity: 6PCS .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List6 x Knife Sharpener StoneNoteManual measurement please allow some error.