def get_fiber_markers(mesh_type='lv'):
    """
    Get the markers for the mesh.
    This is the default markers for fiberrules.

    :param str mesh_type: type of mesh, 'lv' or 'biv'
    :returns: The markers
    :rtype: dict

    """
    if mesh_type == 'lv':
        return {'BASE': 10, 'ENDO': 30, 'EPI': 40, 'WALL': 50, 'ENDORING': 
            300, 'EPIRING': 400, 'WALL': 50}
    elif mesh_type == 'biv':
        return {'BASE': 10, 'ENDO_RV': 20, 'ENDO_LV': 30, 'EPI': 40,
            'ENDORING_RV': 200, 'ENDORING_LV': 300, 'EPIRING': 400, 'WALL': 50}
