Base Diameter: 3-1/2"
Height: 2-1/2"
Threaded Mounting Hole: 7/16"-14
Weight: 1.1 lbs

Fits most Mercury/Mariner outboards 35 hp and above.
Fits Mercruiser Alpha One outdrives.

Zinc Is For Salt Water Use!

Lower Trim Tab Fin Zinc Anode 31640

 Mil-Spec USA

Brand new replacement trim tab anode for Mercruiser Alpha One sterndrives and many Mercury Outboards. Please verify this fits your application prior to ordering.