This page contains free "piston 3D model 3", which is a work by "Unknown author".
Can be downloaded at "Unknown platform" by following the link.
This specific 3D model is provided under the "Unknown license" framework.
Native Formats: ZTL (Zbrush, filesize: 15.4 MB)
Exchange Formats: OBJ (OBJ, filesize: 50.6 MB), STL (Stereolithography, filesize: 83.5 MB)