Neutrik XLR 4P chassis connector female [NC4FD-L-1]].
XLR Panel-mount female receptacle 4 Poles P Soldering Connection
Type XLR DL-series, 4-pole, female.
Nickel housing, silver contacts.
Size housing outside: W=26mm H=31mm.
Diagonal bore.
Very robust with good klick-locking.