Prefitted with bracket.
Adjustable by screw on underside to produce either a high or low note or something in between, so can be fitted individually or in pairs - I am selling the pair which are factory set as a high and low note.

Horns measures 120mm diameter by 42mm tall.

Suits 12volt only (wont suit 6 volt)

Measures 120mm diameter by 42mm tall. 105db high note, 103db low note (103-105db is good & loud!)

Note that these horns are NOS New Old Stock. They have been sitting on my shelf for 16 years until I rediscovered them. They work perfectly as I recently tested them but there is some minor discolouring of the screws which hold them together (which are standard steel not chromed) and the attachment bracket. I have photographed the worst one, please take a look.