The Planet Eclipse Shaft 4 Boost Kit includes .685 and .693 barrel backs. It was developed specifically to improve efficiency, consistency and accuracy, and will give you higher velocities than previous Shaft barrels. Tune your marker further with the Shaft4 Boost Kit to better accomodate the type and size of paint.
**Compatible with Ego11, Geo2 and Shaft4 barrels. Not Compatible with Shaft3 tips!
- Includes .685 and .693 barrel backs.
- Manufactured using the same high grade aluminum to the same exacting standards as all other Shaft barrels.
- Autococker Threads Compatible with Ego11, Geo2 and Shaft4 barrels. Not Compatible with Shaft3 tips!