Digiorange DYMO Compatible 30915 Internet Postage Labels (8 Rolls; 700 Labels per Roll) Each roll contains 700, 1-part labels, measuring 1 5/8" x 1 1/4", on a 1" core. Each roll is packaged in a black poly bag that will protect your labels during transit and storage. These labels are 100% guaranteed. Dymo Compatible 30915 labels work with the labelwriter 400 or 450 Turbo, Twin Turbo or Duo printers. Labels will work with PAID accounts that do not require activation codes. DO NOT BUY THESE LABELS IF YOU HAVE A FREE ACCOUNT. Labels are smudge-proof as well as water and oil resistant