Review on Gasoila High Density Performance Stainless Temperature by Michael Jennings

is mixed color or white PTFE with gray lines or dirt. I think based on the name and some research the gray is nickel metal dust. Also, it lists a max pressure of 300psi, which seems odd. Sounds like you should avoid it unless you want a non-gas-tight (anti-bile) fit. I throw it in the trash.