Genuine Grex replacement part A150008 - Piston. For Grex Models XD, XG, XN, XS. Chart referance number 17.
Genuine Grex replacement part A150009 - Air valve assembly. For Grex Models XA, XD, XG, XN, XS. Chart referance number 19.
Genuine Grex replacement part A150010 - Nozzle wrench. For Grex Models XD, XG, XN, XS, XA
Genuine Grex replacement part A150011 - Threaded insert. For Grex Models XB, XBi. Chart referance number 23.