Classic Turned Stair Baluster 3D model is available on CGTrader for $45. Original author: MonacoFelice. Specs: 10200 polys, 10374 verts.
MAX (Autodesk 3ds Max, filesize: 355 KB), OBJ (OBJ, filesize: 160 KB), FBX (Autodesk FBX, filesize: 217 KB), MAX (Autodesk 3ds Max, filesize: 355 KB)