NMC Pipe marker. 0.004 Material has pressure sensitive adhesive backing and is flexible, which allows for mounting on smooth, curved or irregular surfaces. It is long-lasting for indoor labeling. Meets ANSI standard A13.1-2007. Our durable pipe marker can withstand temperatures from -40 to 180 degree F. Pipe outside diameter size: 2-1/2-inches - 6-inches. Length of field: 12-inches. Measures 14-inches length by 2-inches height. Letter size: 1-1/4-inches. Classification: flammable fluids. Black on yellow color. Legend "AMMONIA".