Special Features:

Component quantity: 25; mounting method and configuration: screwed to upright standards, four 0.125 inche diameter mounting holes on 3.250 in by 2.000 inche mounting centers

Properties:

Two or more different types of items having a common mounting or mounted on each other which together form a portion of a detecting-ranging set but which in itself is not a complete functioning item and cannot be assigned a more definite item name.