PROCRAFT LHD004 - 1-3/8" Screw-Piezo Horn Driver 150 Watts RMS w/ 18 TPI Threads
Frequency response: 3.5K- 20Khz
Power Capacity: 150 watts RMS
Sensitivity: 93dB
1-3/8" Screw-on with 18 TPI threads
Dimensions are 4" diameter x 2-1/2" depth.
*Also available in 2 packs and 4 packs.