The Thomas 1008 microscope slide holder stores four prepared 25 x 75mm (1 x 3") microscope slides (sold separately). The cardboard 3 x 5" tabbed index card is intended for use in a slide storage drawer (sold separately). Numbered slide positions and a numbered list on the card identify the slides. The package contains 12 slide storage cards.

Thomas Scientific manufactures instruments, equipment, supplies, and chemicals for laboratory and scientific applications. The company, founded in 1900, is headquartered in Swedesboro, NJ.