Compatible Dymo 11352 International Return Address Labels (25mm x 54mm). For use in Dymo Labelwriter printers including: Dymo Labelwriter 310 / 320 / 330 / 330 Series / 330 Turbo / 400 / 400 Duo / 400 Turbo / 400 Twin / 400 Twin Turbo / 450 / 450 Duo / 450 Series / 450 Turbo / 450 Twin Turbo / DUO / SE 450 / Twin Turbo Dymo. WILL NOT WORK IN Labelwriter 550 / 550 Turbo / 5XL