This specific 3D model, "Road Barrier Low-poly 3D model order", is an asset made available by "Unknown author".
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The license for this digital asset is "Unknown license".
OBJ (OBJ, filesize: 831 KB), MAX (Autodesk 3ds Max, filesize: 3.9 MB), FBX (Autodesk FBX, filesize: 274 KB)