No materials used. Only textures and in-program data used..........................These models are commonly needed. So go ahead.These models were made with extreme care and special effort was put for the user's ease. Modelled in Blender.
BLEND (Blender, filesize: 7.69 MB), OBJ (OBJ, filesize: 4.54 MB), FBX (Autodesk FBX, filesize: 1.71 MB), GLTF (glTF, filesize: 1.38 MB), STL (Stereolithography, filesize: 3.22 MB), ABC (Alembic, filesize: 1.39 MB), DAE (Collada, filesize: 4.56 MB)