AutoBody101.com

Hey all. One of the needle packing rings from my graco fx3000 is mia since it was last cleaned. I live in canada and am having a hard time finding a replacement at a reasonable price. My question is what should I machine a new one from if I were to just buy some stock and turn one? I kind of assumed it would be teflon, but the black color of it is throwing me off a bit.

Thanks!