100% compatible with the 400/450/4XL DYMO LabelWriter, CoStar and Rollo printers. PLEASE NOTE: Our labels will NOT work with the 550/5XL DYMO LabelWriter printers which require an RFID chip in each roll These 2-part Internet postage labels are perfect for printing high quality, easy-to-read address labels and postage stamps as you need them, eliminating trips to the Post Office. These labels work with PC Postage services. HL-99019 is the same width as HL-30384 and can be used as a substitute Bright white, premium direct thermal label with a strong, long-lasting adhesive for any flat surface. Perforated between labels - easy to tear. Crystal clear printing; fade-resistant; water-smudge-scratch-grease resistant; BPA free Rolls placed in a poly bag and mini-carton to protect from sunlight and dirt UPC 610074756958 Size 6 rolls Color White Brand Name HouseLabels Item Shape Rectangular Unit Count 6.0 Count Finish Type Adhesive Item Weight 4.26 Pounds Manufacturer HouseLabels Model Number HL-30384-006 Material Type Paper Number of Labels 150 Manufacturer Part Number HL-30384-6