Conveyor Belt B 3D model is available on CGTrader for $39. Original author: AhearnART3D. Specs: 26777 polys, 25446 verts.
MA (Autodesk Maya, filesize: 2.85 MB), OBJ (OBJ, filesize: 2.25 MB), MAX (Autodesk 3ds Max, filesize: 704 KB), C4D (Cinema 4D, filesize: 682 KB), 3DS (3D Studio, filesize: 494 KB), MEL (Maya Mel Script, filesize: 2.85 MB)