Attwood Hydro-Stabilzer improves boat performance and cruising range. Puts your boat on plane quicker and improves stability. Design gives best full-throttle performance, once on plane, fins ride out of the water, reducing drag. Made of extremely durable molded plastic... stainless bolts and lock nuts included. 10 3/4" L x 10" W x 3 1/2" H, each piece. For outboards and sterndrives 50 hp and up... will not fit Volvo 280 or 290 outdrives. Order ONLINE Today! Attwood Hydro-Stabilzer
