The Teflon Tape, 1/2? x 520? is made from virgin white PTFE. The tape is made from 0.4 density and 0.003? thick. The tape is 50% elongated and chemically inert. Its elasticity proves beneficiary and hence provides a strong stay for any threaded joint. The tape permits easy disassembly as it is highly durable. It can withstand temperatures up to -400?F to +500?F. It is non-flammable and thus is suitable for use with oxygen and potable water systems. The dimensions are 1/2? wide and 520? long roll.