The OEM Tops Cross Section Pad contains 50 sheets designed for precise drawing and note-taking. It features heavy blue lines every inch and faint blue lines creating four squares per inch, printed with phantom nonsmear ink that does not reproduce when photocopying. The glue-top construction allows for easy sheet removal, while the 20 lb. bond construction ensures durability for tough use. The letter-size pad is backed by a 27 point chipboard for added writing support.