This is a needle base made for the OS Remote R/C Needle set (sold separately).
Specs:
- Mounting holes: 3mm
- Height: 17mm
- Length: 19.5mm
- Thickness: 12mm
- Made for up to 3.5cc engines. If using on larger engines you might need to drill-out the 1.3mm hole and use M4 nipples with a larger inner dia.