"SPECIAL HEAVY DUTY 300 SERIES STAINLESS STEEL BRUSHED ROTARY MOVEMENT; SLOTTED ADJUSTABLE TYPE POINTER; DIAL IS WHITE BACKGROUND, BLACK NUMERALS AND GRADUATIONS; 7/16 INCH 20 UNF-2A FLARELESS BITE TYPE CONNECTION; CONNECTION LOCATION IS AT BACK AND BOTTOM; CASE IS DIE CAST ALUMINUM, GREY ENAMEL FINISH; 4.50 DIAMETER FACE PLATE; GAUGE IS ACCURATE TO PLUS OR MINUS 1.00%; SHOCK AND VIBRATION RESISTANT;"