We start with superior raw materials consisting of: (a) high quality thermal synthetic (polypropylene) paper designed for low-speed thermal barcode printing, (b) a general purpose permanent, rubber-based adhesive, (c) white glassine (release paper), (d) superb whiteness, and (e) water, grease and rub resistance.Labels are produced using the latest technology and undergo numerous quality control checks.HouseLabels' products meet or exceed OEM manufacturer specifications. HouseLabels’ products will not damage your printer’s printhead.We use state of the art glue technologies which conform to our stringent standards. Our labels are produced in a clean environment and immediately packed into protective black polybags to protect the rolls from dirt, sunlight and scuffing.All HouseLabels products are BPA Free, tested by QUATEST 3 in 2024.HouseLabels does not sell DYMO branded labels. "DYMO” and other related branded product names and SKU trademarks are trademarks of their respective owners and not HouseLabels. Neither DYMO nor any of the other printer companies mentioned above sponsor or endorse any products made or sold by HouseLabels.Notice: None of HouseLabels' DYMO replacement rolls will work with the DYMO 550 or DYMO 5XL printers