OMAX 15 Prepared Slides with Plastic Box in Basic Science Set A Professional prepared slides ideal for school education and collection Slides with cover slips and preserved in cedar wood oil for permanent purpose Slide material: optical glass; Thickness: 1mm-1.2mm; Slide size: 76mm x 26mm One end with information label; 15 prepared slides including different samples of bacteria, cell, tissue of plants and animals; Plastic storage box; Size: 3-1/8' x 2-9/16' x 1-3/8 (8cm x 6.5cm x 3.5cm) 1-year warranty against manufacturing defects