Smart Tab Trim Tabs 7 X 8 f/10-12' Boats w/20-25 HPIMPROVES YOUR BOAT'S OVERALL PERFORMANCE - GUARANTEED!!!If these trim tabs don't provide you with an outstanding performance increase, contact us within 30 days of your purchase.Why buy a manually adjusting trim tab set when you can get the automatic trim tabs that will self adjust and perform better for less money?Our breakthrough technology in trim tabs is completely automatic requiring no operator adjustment while underway. Nauticus trim tabs