The OEM Tops Cross Section Pad contains 50 sheets, ruled with 10 squares per inch using phantom nonsmear ink that does not reproduce when photocopying. Each side features heavy blue lines outlining every inch, with faint blue lines marking the squares. The glue-top construction allows for easy sheet removal, and the 20 lb. bond paper is durable enough for tough use. This letter-size pad also includes a 27 point chipboard backer for added writing support.