This is a replica of the gear shift boot for my Kubota B7000 subcompact tractor. It might also fit B6000, B7100, and others with a gear transmission. It's a tight fit over the transmission opening, and slips down over the shifter shaft. You'll have to remove the shift knob to install it as TPU isn't flexible enough to stretch over it. You can slice the STL as-is, or you can grab the FreeCAD source file if you want to tweak it.