Immediately see when a Tissue Cassette has been removed from storage. 1 3/4″ high markers stand 1/8″ above tissue cassettes for easy visibility. Provide all the information about the removed cassette: Case number, Date removed, Initials of person removing cassette, 4 vertical spaces for other information, such as location sent, address, phone number, Easy color coding – available in 6 distinctive colors, Packed in convenient boxes of 1,000 markers, one color per box.