Preferred Postage Supplies double postage meter label compatible replacement for PB #'s 612-0, 612-7, and 620-9. It has a total sheet size of 5.25"x3.5" with imprint areas of 5.25"x1.625" They come two labels per sheet, 150 sheets per box, and 300 labels per box. They work in the following machines: Mailstation K700/K705, Mailstation 2 K7M0, DM100i, DM125, DM200L DM225, P700/P7L1, Personal Post (E700 Serie), DM300c, DM400c, DM475c, DM500, DM525, DM550, DM575, DM800i, DM825, DM875, DM900, DM925, DM1000, & DM1100. All of our labels are packaged in high quality white boxes. Our boxes prevent damage from occurring during shipping and make it easier for you to store your labels. Many competitors labels are shrink wrapped because it is cheaper but they do not protect the labels from getting damaged and from laying loose all over the place once the shrink wrap is opened.