Brady's Blank Write-On Calibration Labels stand up to harsh environments and ensure long-term identification. Brady B-500 is a polymer coated cloth with a printable topcoat and a rubber based pressure sensitive adhesive. Brady B-500 is a general purpose material for a variety of pre-printed labeling and wire marking applications requiring durability and economy. Brady B-500 has good oil and water resistance and good print durability. B-500 has excellent flexibility for wrapping around curved surfaces.