Create signage inserts on your laser or inkjet printer; compatible with Macintosh and IBM computersIncludes software, pre-printed directional arrows and 20 non-perforated blank, white, 110 lb. Index Bristol sheets with preprinted guidelines (each sheet contains 5 blank inserts). Software includes titles for standard reading categories and Dewey decimal system classification, as well as formatted blanks to customize your own inserts. Create colorized labels by using "format" and "shading" functions in software.20 per package.Refill packages of 30 blank sheets (part number 1121) and sign holders (keyword: Alphafast sign holders) are available and sold separately.