Check the listing for details. 72 DOUBLE CONCAVE 2 WELL MICROSCOPE SLIDES. Condition: New. Listed at 53.25 USD. International Buyers – Please Note: Customs and brokerage fees, import duties and taxes are not included in the item price or shipping cost. These charges are your responsibility. Please check with your country's customs office to determine what these additional costs will be prior to buying. Avogadro's Lab Supply Double Concave Glass Slides with Ground Edges Offered here are 72 individually pre-cleaned double concave glass slides. These slides are of an excellent quality with regard to the optical clarity and planeness of the surface. They are packaged in a cellophane wrapped compact box with each slide interleaved with paper. Double well slides are used for comparative three dimensional studies of specimens such as paramecium or euglena. Specifications: Length Width Thickness 3" / 76.2 mm 1" / 25.4 mm 1 - 1.3 mm Well Depth Well Diameter 0.6 - 0.8 mm 15 - 18 mm Cover slips are also available Click and Go All merchandise offered by Avogadro's Lab Supplyis New from the manufacturer! Don't forget to visit my for great deals on all your lab supply needs!!!