Pipe Seal Tape PTFE 1/2x1296 0.4 density, 0.003" thick. Over 50% elongation and chemically inert. Provides a strong tight seal for any threaded joint and permits easy disassembly. Tolerates -400 to + 500 degree Fahrenheit. Suitable for use on oxygen systems. Non-toxic and non-flammable. Meets Federal Specification T-27730A. PIPE THREAD SEAL TAPE Wdth x Lgth In=1/2 x 1296 BLUE SPOOL - BULK NOT BAR CODE PTFE , EA