A Phantom tip, or
NY thin, is the
de facto replacement spray tip for
graffiti writers who wish to paint clean, detailed
pieces. They are responsible for that "how did he do that with spray paint?!" look.
When used properly, Phantoms produce a medium-to-thin line with no overspray. Cutting lines is almost impossible to do cleanly without them (unless you paint only with stock tips).
Phantom tips are white, with the spray nozzle itself black and flush with the face of the tip. They are compatible with almost all brands of spray paint, including Rustoleum and Krylon. You can find them on various household cleaning supplies, or through mail-order.
See also: fat cap, stock tips.