Organize and classify your slides for instant reference and fingertip-fast retrieval. Use the index-card Microscope Slide Holders to sort, classify, or arrange slides in any order. Fingers never touch the slide. Cards may be added, removed, or changed for fast updating and filing—insert a new card anywhere. You will never outgrow this system. Adapts instantly to your slide ID system (numbers, letters, dates, names, or color coding). Visible, four-position tabs provide “always in sight” indexing. Ruled data lines are keyed to numbered slots and allow complete slide identification, plus your comments. The durable holder is 3 x 5-inch cardboard fitted with a protective plastic frame. It ensures safe, clean, scratchproof, and secure protection for your specimens. Slides never touch. One hundred percent compatible with any and all makes of slides. Each slide holder card accepts four slides of 75 x 25 millimeters or 3 x 1-inch size of any thickness.