Screw-on mini waveguide WG08-25 from PRV Audio is an exponential horn to consider! At 1.72″ of depth, this horn makes installation easy in tight spaces. A standard 1-3/8″-18 TPI Screw on mount is compatible with any PRV 1″ exit screw-on compression drivers. The WG08-25 is constructed from non-resonant ABS plastic, making it perfect for outdoor or automotive use. Acoustic loading is maintained down to 1600 Hz. Its slim mounting depth of 1.72″, with an ultra small 3.31″ x 3.31″ faceplate, takes up very little mounting space, allowing you to mount a compression driver between speakers. Designed to deliver big performance in very limited space, when you add any PRV 1″ Exit Driver to it. Its 90° x 90° dispersion pattern is ideal for short throw applications Non-resonant reinforced plastic construction, with unique pattern dispersion to minimize reflection for a more consistent sound Recommended minimum crossover frequency of 1,600 Hz Includes 4x screws GENERAL SPECIFICATIONS Throat Diameter 1” (25.4mm) Mounting Type Screw-on Thread dimensions 1-3/8″ Nominal Coverage Horizontal 90° Vertical 90° Flare type Exponential Material Plastic (ABS) Finish / Coating Black Dimensions Height 3.31″ (84mm) Width 3.31″ (84mm) Depth 1.95″ (49.5mm) Mount Depth 1.72″ (43.5mm) Baffle Cutout Width 2.80″ (71mm) Height 3.31″ (84mm) Net weight 0.13lb (0.06kg)