def get_fort46_info(NTRII, NATM, NMOL, NION):
    """Collection of labels and dimensions for all fort.46 variables, as collected in the 
    SOLPS-ITER 2020 manual.
    """

    fort46_info = {
        "PDENA": [r"Atom particle density ($cm^{-3}$)", (NTRII, NATM)],
        "PDENM": [r"Molecule particle density ($cm^{-3}$)", (NTRII, NMOL)],
        "PDENI": [r"Test ion particle density ($cm^{-3}$)", (NTRII, NION)],
        "EDENA": [r"Energy density carried by atoms ($eV*cm^{-3}$)", (NTRII, NATM)],
        "EDENM": [r"Energy density carried by molecules ($eV*cm^{-3}$)", (NTRII, NMOL)],
        "EDENI": [r"Energy density carried by test ions ($eV*cm^{-3}$)", (NTRII, NION)],
        "VXDENA": [
            r"X-directed momentum density carried by atoms ($g*cm^{-2}*s^{-1}$)",
            (NTRII, NATM),
        ],
        "VXDENM": [
            r"X-directed momentum density carried by molecules ($g*cm^{-2}*s^{-1}$)",
            (NTRII, NMOL),
        ],
        "VXDENI": [
            r"X-directed momentum density carried by test ions ($g*cm^{-2}*s^{-1}$)",
            (NTRII, NION),
        ],
        "VYDENA": [
            r"Y -directed momentum density carried by atoms ($g*cm^{-2}*s^{-1}$)",
            (NTRII, NATM),
        ],
        "VYDENM": [
            r"Y -directed momentum density carried by molecules ($g*cm^{-2}*s^{-1}$)",
            (NTRII, NMOL),
        ],
        "VYDENI": [
            r"Y -directed momentum density carried by test ions ($g*cm^{-2}*s^{-1}$)",
            (NTRII, NION),
        ],
        "VZDENA": [
            r"Z-directed momentum density carried by atoms ($g*cm^{-2}*s^{-1}$)",
            (NTRII, NATM),
        ],
        "VZDENM": [
            r"Z-directed momentum density carried by molecules ($g*cm^{-2}*s^{-1}$)",
            (NTRII, NMOL),
        ],
        "VZDENI": [
            r"Z-directed momentum density carried by test ions ($g*cm^{-2}*s^{-1}$)",
            (NTRII, NION),
        ],
        "VOLUMES": [r"Triangle volumes ($cm^{3}$)", (NTRII)],
        "PUX": [
            r"X-component of the poloidal unit vector at the triangle center",
            (NTRII),
        ],
        "PUY": [
            r"Y-component of the poloidal unit vector at the triangle center",
            (NTRII),
        ],
        "PVX": [
            r"X-component of the radial unit vector at the triangle center",
            (NTRII),
        ],
        "PVY": [
            r"Y-component of the radial unit vector at the triangle center",
            (NTRII),
        ],
    }

    return fort46_info