Comparison : Item # SJ B/P, Miscellaneous Back Plates (Raw Metal/Unplated)
Item # S27 B/P, Miscellaneous Back Plates (Raw Metal/Unplated)
Item # S47 B/P, Miscellaneous Back Plates (Raw Metal/Unplated)
Item # SU2 B/P, Miscellaneous Back Plates (Raw Metal/Unplated)
Item # SU4 B/P, Miscellaneous Back Plates (Raw Metal/Unplated)