Josef Kihlberg JK 561-18 box staples are for use in the Josef Kihlberg 561-18 carton stapler. These staples conform to Josef Kihlberg strict standards and can improve the performance of your carton stapler. The Josef Kihlberg 561-15 is equivalnet in size to the C 3/4 box staples. Box Stapler Supply has a wide selection of box staples, carton staples and Josef Kihlberg products.