For some P&H and Venture kayaks, as well as some Tide Race and Kajak Sport brand kayaks, possibly other brands too. An injection molded low profile retractable plastic skeg, end wire ø 3mm/2,5m for assorted sea kayaks. Blade is 14 5/8 inches long, 4 7/8 inches at the widest, no more than 3/16 thick. Slot on the end is 1/4 inch wide and about 1 inch deep. The skeg blade is made of durable and stiff glass reinforced nylon. A skeg box is not available for this shape. A Skeg control unit is not included with this product. See other blade types and more parts of the Kajak Sport Skeg System. KSSS