Genuine Graco (RAX517, RAC-X 517) RAC X Tip & Guard Combo . Comes complete with RAC X 517 Tip, RAC X Guard, and OneSeal.
It's like getting a RAC X Guard for less than $4.50 - a $24.95 value.
Part #: RAX515
Part #: 243057
Part #: 17P550
Part #: 244067
Part #: LTX
Part #: 246215
Part #: 246453
Part #: 248936
Part #: FFLP
Part #: WR