6 inH x 6 inW x 4 inD Metallic Enclosure, Gray, Knockouts: Yes, Screws Closure Method/ BODY LENGTH: 6.000 INCHES NOMINAL BODY WIDTH: 6.000 INCHES NOMINAL COVER MOUNTING HOLE QUANTITY: 4 INSIDE DEPTH: 4.000 INCHES NOMINAL ENTRANCE QUANTITY: 3 COVER TYPE: FLAT COVER ATTACHMENT METHOD: SCREW END ITEM IDENTIFICATION: FILTERS COVER OPENING SHAPE AND QUANTITY: 4 OBLONG ENTRANCE DIAMETER: 0.750 INCHES SIDES SPECIAL FEATURES: MOUNTING HOLE HEIGHT: 3.88 INCHES, MOUNTING HOLE WIDTH: 3.88 INCHES; KNOCKOUT PATTERN: TWO 1/2 - 3/4 INCH AND ONE 3/4 TO 1 INCH MATERIAL: STEEL OVERALL SURFACE TREATMENT: OVERALL STYLE DESIGNATOR: C6 RECTANGULAR-SQUARE CORNER BOX