MRC:
Those unusual or unique characteristics or qualities of an item not covered in the other requirements and which are determined to be essential for identification.FEAT
Special Features:
Between first decision ceg - one toggle handle per unit, second decision - poles -1 with 6 screw terminals, third decision -1 series, forth decision frequency and relay -51 dc short delay, fifth decision 5.0 - use three numbers to print required valve between .050 amps (u.L.)/.100 amps (vde) and 50.0 amps , sixth decision - a - metric thread mounting terminals and screws, seventh decision -91 white w/black markings