Our 3-Part Carbonless Perforated Computer Paper is a high quality and proven to preform. 1/2 Inch removable margins allow for easy filing and viewing of printed data. Each 3-part white, canary and pink sheet measures 5.5 x 11 inches. Our 3-Part Carbonless Computer Paper features a strong 15 pound stock and contains 2100 sheets per carton. Works in Trendar continuous feed printers, dot matrix printers and many other machines!