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Premium 6 Inch with 50mm Diamond Grinding Wheel for Gemstone Polishing and Lapidary. Customizable to meet your requirements Support OEM & custom production. We adopt high-quality raw materials for stable performance and outstanding durability. Multiple grit options available from. Flexible dimension options Standard diameters: 6 inch / 8 inch. Available width: 25mm, 38mm, 50mm. Special sizes can be tailored per your drawing or samples. Electroplated diamond abrasive layer Firm electroplated bonding holds diamond grains tightly. Sharp cutting action, low vibration, long working life, ideal for gemstone, jade and hard material grit.