Compatible air mix door arm replacement. Often the original arm snaps but the motor is ok, so this saves you from having to buy an entire motor assembly. It's an original design and NOT a 1:1 match with the original (mine broke and is long gone, so I had nothing but pictures to help with the design). I printed in ABS to hopefully cope with the heat. It's designed to be a very tight fit, so you may need to shave the hole bore slightly for it to press on.
The author marked this model as their own original creation.