Sleeve and Adaptor.png
These two parts was designed to fit between Stom Support assembly and white PVC vacuum pipe near the base of the desk chair.
The orange one is for connecting Stomach Support assembly and PVC Collar.
The blue part is a thin sleeve printed to fill the gap between PVC tube and the steel stem of the base chair. About 0.5 mm wall thickness. I glued this fragile shim tube inside of the Long PVC tube as per the other picture viewed from the end of the base tube.