Q: How about quality assurance & after-sales service? A: The Naroote store has always been committed to providing customers with high-quality products and excellent services. If you encounter the following problems: Any questions about the product, Not received the product, logistics has damaged the product, or you are not satisfied with the product itself, you can contact us at any time, and you will get satisfactory answer within 24 hours. Looking forward to your purchase and experience of our products！ Q: What should I do if there is a problem when the product arrives? A: When there is a problem with the product, please take pictures in time to retain the evidence and provide us with professional customer service, you will get the most satisfactory answer. Q: What about product packaging? A: Before we sell it to you, we will have a professional inspector to inspect the product to be packed. If there are any product issues, we would rather get rid of them than sell them to our customers! Specification: Condition: 100% brand new Material: Silicon carbide Optional Size: (Diameter*Inner diameter*Thickness) Approx. 110*20*0.2mm / 4.33*0.79*0.007 inch Approx. 110*20*0.3mm / 4.33*0.79*0.012 inch Approx. 110*20*0.4mm / 4.33*0.79*0.016 inch Approx. 110*20*0.5mm / 4.33*0.79*0.019 inch Package List: 10 * Diamond Cutting Disc