Telo-CatDesigned especially for catamarans, the Davis Telo-Cat(TM) is durable and highly visible. Installs on the headstay bridle in seconds; easily removed for trailering (no tools required). Comes complete with high visibility 8 (20cm) vane, adjustable tacking arms, and mounting hardware to fit most catamarans. Made of high impact plastic with a stainless steel shaft and tacking arms. The vane rides on a super sensitive TeflonA(R) bearing system for extreme accuracy in light or heavy weather. Can take the abuse of catamaran sailing.Includes complete mounting instructions for the following catamarans:Hobie: 14, 16Supercat: 15, 17Prindle: All models with turnbuckle forestay adjusterNACRA: 5.2