Cylinder Mounting Hardware Mount Type Flange For Bore Diameter 3 1/4 in Body Material Aluminum Overall Length 5 1/2 in Mount Hole Center-to-Center Width 4 3/4 in Overall Width 5/8 in Overall Height 3 1/4 in Compatible with Brand Speedaire Includes (4) Bolts Product Type Head Rectangular Flange System of Measurement Inch