Seachoice Trumpet Horn Dual 50-14561 by Seachoice $131.01 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Seachoice Dual Trumpet Horn #50-14561 Size: 20-3/4" 109 Db All stainless steel trumpet tube, mounting bracket and motor cover. Vibration free mounting with rubber pad. 12V. Fastens with #10 screws.