Seachoice Compact Electric Horn w/ Stainless Steel Cover, Single, 105 dB, 8 Amp alt-37-6441 and the nominal outside diameter

and the nominal outside diameter is 5/16-In

Manufacturer part number 50-11911

Silicon Bronze

Fabricated of molded high-impact plastic that won't rust

Seachoice Compact Electric Horn w/ Stainless Steel Cover, Single, 105 dB, 8 Amp alt-37-6441 and the nominal outside diameterDelivering a loud and unmistakable blast, this compact electric horn will quickly make your presence known. Maintenance free and easily mounted out of the way, Seachoice horns produce a far reaching distress signal over land and water. Suitable for use in extreme weather exposure locations and limited space applications. Complete with mounting pad and wire harness. Seachoice is committed to delivering quality marine accessories and OEM replacement