DYMO-Compatible 30383 3-Part Internet Postage Labels (2-1/4" x 7") -- BPA Free! (1 Roll; 150 Labels per Roll) House Label branded products are manufactured by House Labels and ONLY sold by House Labels and Amazon Supplies. There may be other companies claiming to sell this product . House Labels stands behind their products with a 100% guarantee of satisfaction. When you look at reviews, please bear in mind that the review may be of a product (possibly an inferior product) manufactured by one of these companies and not a House Labels product. 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. 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 Label Writers: XL, XL+, BC, BC+, TURBO, SE200, SE250, ACII 200 / ASCII 250 All labels sold by House Labels for use in DYMO Label Writers 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.