Military DCM D 450 II Headphones

Military Issue Headphones. DCM D 450 II Headphones.  New, in box.  Adjustable single band headband. Headset cord length 120 inches, Dynamic, Terminal Type Tab, Solder Lug, Impedance rating in OHMS 60.0 nominal,  Frequency response range in hertz 20.00 to 20000.00.  Output sensitivity rating in decibels 94.0.  Signal input terminal type phone tip. NSN# 5965-01-028-0325. NOTE THESE ARE NEW BUT BECAUSE OF AGE THEIR FOAM ON THE HEADSETS ARE CRUMBLING. IT WILL NEED TO BE REPLACED.