SEI MARINE PRODUCTS- Mercury Mariner Force Trim Tab 822157T2 25 30 35 40 45 50 HP 2/4 Stroke round portion 3.5" This zinc trim tab replaces OE#: 822157T2 and fits 25-50 HP 2 stroke and 4 stroke Mercury, Mariner, and Force outboard lower units from 1997-2006.