This pack includes: 1x Hall effect RPM sensor, set of screws, 2x Neodymium fan magnets and mounting brackets for .50 and .90 size nitro engines. The magnets are 4mm diameter x 2mm thickness.
Suitable for: Spartan Vortex and most other flybarless systems.
![AP-2000i Flight Stabiliser [Clearance]](http://www.spartanrc.com/store/images/T/src-ap2k_t.jpg)
