This item is a PACKING KIT.
Here is a PDF of exactly the parts this kit includes.It is used with the Titan Impact 440 ; 540 ; or 640 model airless paint sprayers.
Prime Spray Valve Assembly Replacement Kit 0512250
0515221 Inlet valve seal (770)
#5- 0515237 Outlet valve (770)
Ring (fits above diaphragm)