BOLT 12x16 Heavy Duty Trim Tab SystemDesigned for rougher conditions and higher speeds, the BOLT1216HD (12” span x 16 chord”) heavy-duty electric trim tab system features an adjustable upper hinge actuator and requires less than 10.25” of vertical transom height. The high-performance laser-cut, tapered trim tabs are manufactured with extremely durable 12-gauge, electro-polished stainless steel, featuring a full-profile backing plate, and up-fins for added strength.