Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Headstamp ID | Primer Annulus Color | Bullet Tip Color | Other Features | Functional Type |
| --- | --- | --- | --- | --- |
| VII or VIIZ | Purple | None | None | Light Ball |
| VIIIZ | Purple | None | None | Heavy Ball |
| G1, G2, G3, G7 or G8 | Red | None | None | Tracer |
| G4, G4Z, G6 or G6Z | Red | White | None | Tracer |
| G5 or G5Z | Red | Gray | None | Tracer |
| W1 or W1Z | Green | None | None | AP |
| B4 or B4Z | Blue | None | Step in bullet jacket | Incendiary |
| B6 or B6Z | Blue | None | None | Incendiary |
| B7 or B7Z | Blue | Blue | None | Incendiary |
| O.1 | Black | Black | None | Observing |
| PG1 or PG1Z | Red | None | Blue band on case base | Practice-tracer |
| H1Z | None | None | Front half of case blackened | Grenade-Launching |
| H2 | None | None | Entire case blackened | Grenade-Launching |
| H4 | None | None | Case blackened 3/4" inch from each end | Grenade-Launching |
| H7Z | None | None | Rear Half of case blackened | Grenade-Launching (v.powerful load) |
Question:
Tell me the bullet tip color of headstamp id of h1z
Answer:
None