This pack of contains 1000 compatible franking labels which are compatible with several Pitney Bowes printers. You can find a full list of compatible machines listed on this page.These high quality franking labels aim to have the same level of absorbency as the manufacturers own labels to give clear and durable postage labels. Each of the 500 strips contains two 152 x 42mm labels with a 1.6mm unused strip in the middle. The actual size of these strips is 152mm long and 100mm wide.