Lenco 15049-101 High Performance 18 x 12 Electric Trim Tab Kit without Switch This trim tab kit is designed for boats with multiple engines and limited transom space. The contoured blades will help decrease cavitation for a smoother ride. The trim tabs are made from 12-gauge 304 stainless steel that has been electro-polished for extreme corrosion resistance. This kit is intended for boats between 16 - 40 in length. These trim tabs are 18 deep by 12 wide. Trim switch sold separately Trim Tab Kit