It is made from flexible polyfiber paper with an acrylic resin adhesive back. These labels are designed to withstand a temperature range of -40 to 121 °C, making them suitable for use in a variety of laboratory conditions, including steam autoclaving and gamma irradiation. Waterproof and resistant to most organic solvents and caustic agents, these labels adhere to a variety of surfaces, including PTFE-coated surfaces, without cracking or peeling. They can be easily removed without leaving sticky residue. Supplied in a convenient dispenser box containing 1000 labels.