Dymo - DYM2187918 In a fast-paced laboratory or medical environment, you need labels that are reliable and withstand extreme temperatures, moisture, water, oil and chemicals. LW Durable Labels are ideal for test tube applications to reliably store samples and specimens in demanding environments. With 500 labels and 65 percent less waste thanks to Automatic Label Recognition, you can depend on getting the job done efficiently and with a high level of organization.