This is a replacement joystick knob for a large variety of different powerchairs.

This cactus joystick is one that you can actually hold in your hand without getting injured. It is textured to give it a spikey look but still feels good in your hand.

The hole is 1/4" in diameter; however, if you need a different hole diameter, please let me know. I can adjust it.  There is a screw on the back of it, so it can be tightened.

We can confirm fitment on the following models; however, you should still measure the joystick shaft to make sure it is ¼” before ordering. 
Permobil F3, Permobil F3 Corpus, Permobil F5, Permobil Koala, Permobil M3, Permobil M3 Corpus, Permobil M5, Permobil M300, Permobil 300, Quantum 3, Quantum Edge 3, Quantum Q6,  
Quantum Q6 Edge, Quantum Q6 Edge 2.0, Quantum Edge 2.0,  Quantum Stretto Q-Logic 3, Quickie 646, Quickie 636,  Jazzy Passport, Jazzy 7, Jazzy HD, Terra/Terra SX B+B Enjoy Mobility, 
Air Hawk Power Chair, Alltrack HD/HD3, Vive Mobility Foldable Long Range Transport Aid, MobilityPlus+ Ultra-Light, Invacare TDX SP, Scewo Bro, Fold&Go Magshock
This was heavily remixed from a model created by Thingiverse user johnbiehler, and is licensed under cc. Low Poly Mexican Cactus by johnbiehler on Thingiverse: https://www.thingiverse.com/thing:152021