Rectangular staining dish is used for staining specimens on slides. Wheaton “800” glass. A stainless steel wire holder for lifting tray and a removable glass tray are included. Includes lid. Will hold 20 slides that are 3"" x 1"" or 3"" x 1.5"" or 3"" x 2"". Will hold up to 350ml of liquid (without slides).