$145.00
This is the round mix chamber for the Graco Fusion FX spray gun, in the 0.037 in orifice size. Graco's own listing for it is mix chamber, Fusion FX, 37, and the exploded parts diagram shows it among the FX round mix chambers.
The FX round chambers come in several orifice sizes and are not interchangeable, so go by the number rather than the shape of the part. Confirm the size your gun is currently set up with, and order for the work ahead if you are changing sizes. This chamber is listed for the Fusion FX; the Fusion AP and Fusion PC guns have their own chamber part numbers.
Genuine Graco OEM part FX37RD.