Pyle-Pro PH714 Constant Directivity Loudspeaker Horn (Screw-on Type, 16.5" x 6.25") Material: ABS Resin Nominal Coverage Angle (HxV)-6 dB:90x40 Cut Off Frequency: 1000 Hz Throat Diameter: 26mm - Dimensions: 6.25"h x 16.5"w x 8.65"d Mounting Type: Zinc Screw Insert 1 3/8'' - 18 UNEF Cut off frequency: 1000Hz Throat diameter: 26mm Mounting type: zinc screw insert 1 3/8" - 18 UNEF 16.5' W x 6.3' H x 9.7' D