Description 100 PCS/Box Circular Cover Slides Glass Plate Coverslips WHB Round Coverslip Specifications: Quantity: 100 pieces in one box Size: 3mm-50mm for choosing Thickness: 0.006" (0.13 - 0.17 mm) Material: Glass Pictures 1.AliExpress supports Alipay,Visa, MasterCard, Maestro Debit Card,Western Union, Bank Transfer, Webmoney, QiWi Wallet and Boleto through secure payment processor ESCROW. 2.Please be assured your payment is safely kept by AliExpress until you confirm the delivery of your order. 1.We guarantee to ship goods out within our default handling time after payment confirmation except holiday. 2.We ship by China post,EMS,DHL,Fedex,according to your choice when placing orders . 3.If you don't receive the item after 60 days ,please feel to contact us.We will make all our effort to solve the problem. 4. Due to different policies in different countries, there might be customs tax that should be paid by buyer. It is uncertian. We won't take any responsibilities for any taxes / fees occured at destination countries. We are not responsible for delays caused by the customs,Import duties,taxes or other customs charges. Before purchasing, we welcome you to contact us for any questions you have of the products you are interested in. If you don't satisfy with the product you bought, please contact us first. You can return the product for exchange or refund. In this case, buyers should pay for the both shipping fee for sending & returning. For defective items or repair items, buyers should pay the return shipping fee and we will ship the replacement .(Only applicable for items after receiving in 60 days.) For DOA product, we have the right to ask buyers to provide images/ videos. After we confiirm the situation, we will arrange refund or replacement at your option. All the products are well tested before shipping. If any DOA shipments you got, please contact us first instead of open disputes. We will get back to you in 24 hours & assist you for any questionis. Thank you for choosing our products and thank you for your cooperation 1. You satisfaction and positive feedback is very important to us. Please leave positive feedback and 5 stars if you are satisfied with our items and service. 2. If you have any problems with our items or services, please feel to contact us first before you leave negative feedback. We will do our best to solve any problems and provide you with the best customer services. 3. Your encouragement and support is our continuously forward momentum. Thank you very much Best Wishes Thank you