My fully working 737 design for the CPT and FO adjustable vent blower that are located on the knee panels.
It has a 25mm flexihose input to allow actual airflow through the vent. The vent can be closed or opened and directionally aimed.
You will require a 1mm rod or pins to attach the centre louvre
The unit is held together with x4 4mm screws.
Printed in Black or dary grey PLA.