Pyle-Pro PH916 - Bolt-on Type Constant Directivity Horn (Discontinued by Manufacturer) (Discontinued by Manufacturer) Material: ABS Resin Nominal Coverage Angle (HxV)-6 dB:90x40 - Mounting Holes Number: 4N Cut Off Frequency: 1000 Hz - Bolt Circle Diameter: 102mm (4'') - 76mm (3'') Throat Diameter: 36mm - Unit Dimensions: 8.8&#34;h x 17&#34;w x 7.7&#34;d Mounting Flange Diameter: 114mm Mounting Hole Diameter: 6.5mm Cut off frequency: 1000Hz Throat diameter: 36mm Bolt circle diameter: 102mm - 76mm