12 Rolls; 150 Labels per Roll of DYMO-Compatible 30383 3-Part Internet Postage Labels (2-1/4" x 7") -- BPA Free! Buy this genuine HouseLabels' product with confidence -- a 100% guarantee of satisfaction is provided. This product is genuine ONLY if the HouseLabels' logo is behind the release liner of each label AND each roll is packed in an individual mini-carton, with the HouseLabels' logo, to protect each roll from sunlight and scuffing. Each white label is blank and ready for your printing. 2-1/4" x 7" | Rectangle | White | Direct Thermal | BPA Free | Permanent-Adhesive | Fluorescent ink compliant with USPS regulations |150 Labels per Roll These labels are 3-part internet postage labels with recipient address, return address and postage indicial label on one form  Fluorescent ink compliant with USPS regulations  Print from your favorite shipping program Endicia.com or Stamps.com  Printing concatenated barcode labels for commercial pricing from Endicia/DAZzle requires Dymo 30387 labels. DYMO Printers: 300, 310, 315, 320, 330, 400, 400 Duo, 400 Twin Turbo, 450, 450 Duo, 450 Turbo, 450 Twin Turbo, 4XL, EL40, EL60, SE300, SE450  CoStar LabelWriters: XL, XL+, BC, BC+, TURBO, SE200, SE250, ACII 200 / ASCII 250 All labels sold by HouseLabels for use in DYMO LabelWriters are tested to ensure that they fall within DYMO specifications  Labels are smooth and bright white for professional results  Labels are smudge-proof as well as water and oil resistant  All temperature, strong permanent adhesive is excellent for all general purpose labeling applications  Each roll is individually packed into a protective black polybag and then placed in a mini-carton to protect it from dirt, sunlight and scuffing.