The 7-2008-2 is a replacement carbon disc for the Spark Timer Accelerator appartus.
| Order# | Description |
| 7-2008 | Spark Timer Accelerator Apparatus |
| 7-2008-1 | Replacement Paper Roll |
| 7-2008-2 | Replacement Carbon Disc |
The Carbon Disc is used as an electrical contact and seldom requires replacement.
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