Following list is a sampling of internal parts you will need for 250amp water cooled tig torch.  you will recieve 1 of each:
Long Back cap.(41V24), 1/16" Collet.(13N22), 3/32" Collet.(13N23), 1/8" Collet (13N24), 1/16" Collet Body (13N27), 3/32" Collet Body (13N28), 1/8" Collet Body (13N29), #5 (5/16" ID) Alumina Cup (13N09), #6 (3/8" ID)Alumina Cup (13N10), #8 (1/2"ID)Alumina Cup (13N12)
and as a bounus 1 each of 1/16", 3/32", 1/8" x 7" 2% Tungsten