IDEALSEAL double postage meter label is a compatible replacement for PB #'s 612-0, 612-7, and 620-9. It has a total sheet size of 5.25" x 3.5" with imprint areas of 5.25" x 1.625" They come with 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.