What Transducer do I Have?

[rgreenland]

I have a Vexilar FL18. The Transducer needs to be replaced as the cord has a short. When I go to look them up I can choose the 9, 12, or 19 degree. How can I tell which one I have so I can order the right part?

Maybe a question for TD....but is there a simple explanation out there of the differences between them all?

Thanks
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