This is a model that I made of a NestaFlex 226 Roller. It is accurately measured to scale.
STL (Stereolithography, filesize: 1.15 MB), OBJ (OBJ, filesize: 969 KB), 3DS (3D Studio, filesize: 871 KB), DAE (Collada, filesize: 1.96 MB), FBX (Autodesk FBX, filesize: 1.49 MB), IGE (IGES, filesize: 299 Bytes), MAX (Autodesk 3ds Max, filesize: 1.69 MB), SKP (Sketchup, filesize: 1.5 MB), OTHER (Other, filesize: 946 KB)