Universal D-size metal body XLR panel mount series for pcb mount applications. Insert is removable from shell for ease assembling. UL recognized component. NC3FD-H & NC3MD-H: Nickel housing and silver contacts. NC3FD-H-B & NC3MD-H-B: Black metal housing and gold contacts. NC3FD-H-BAG & NC3MD-H-BAG: Black metal housing and silver contacts.