Convenient, prepunched paper for specialized applications. Lettermark punched papers are designed to perform well on laser printers, inkjet printers and copiers. Punched paper features ColorLok Technology for bolder blacks and vivid colors with inkjet printing and better quality and performance with laser printing. Acid-free for archival quality. Prepunched 20-lb paper comes in a case of 5 reams with 500 sheets per ream. Prepunched left paper is easy to store in notebooks and binders. 7-hole paper comes in a ream of 500 sheets with a pack of 5 reams.