Check the listing for details. 1PC 25*3mm Single Concavity Circular Concave Cavity Microscope Slide. Color: White, Condition: New. Listed at 16.00 USD. 1 Hole 3mm Thickness Circular Concave Cavity Biological Microscope Slide Optical Glass Description Feature: Item Type: Circular Concave Cavity Biological Microscope Slide Material: Optical Glass 1 well（Hole diameter:16mm） Thickness: 3mm Size: 25mmx3mm Well Diameter: 16mm Well Depth 2mm 1 well（Hole diameter: 20mm） Thickness: 3mm Size: 25mmx3mm Well Diameter: 20mm Well Depth 2mm Packing List: 1pc Shipping Items are normally shipped within 1-2 working days of receiving (cleared) payment and will be shipped by air parcel to worldwide. We do offer combined shipping discount if you pay all together.The shipping & handling fee includes packing, warehouse and distribution costs, not postage only, these are non- refundable.The estimated shipping time is about 10 to 20 days to arrive buyers' location. All items will only be shipped to the address you registered with PayPal. please make sure yourshipping address on Ebay is correct BEFORE placing your order. Contact Us Your satisfaction is important to us. If you are not satisfied with our products/services, please contact us BEFORE leaving us any neutral or negative feedback. We will try our best to resolve any issue. If you satisfied our items and service, hope you could leave a positive feedback with all stars for me. We are using the automatic eBay Feedback system which would automatically leave positive feedback after receiving positive feedback. You can contact me if you have any questions. Our Business Hours（Beijing）: 8:30A.M.-5:30P.M. Mon-Sat