Primus 15.5 Stainless Steel Steering WheelPolished 316L SS Cast Steering Wheel with Santoprene finger grip, rim grip, and solid spoke, 3/4 tapered shaft, and comfortable stainless steel glass ball bearing control knob.The Primus is manufactured using a unified investment casting, including the integrated ring, for massive strength, and is designed to deliver maximum ergonomic all-day comfort and is engineered for long-lasting, uncompromising durability. The visually striking wheel complements any helm and comes with a lifetime warranty on the corrosion-resistant stainless steel and three-years on the Santoprene rubber grip and inserts.Available in 13.5″ and 15.5″ diameters, the rim is slightly thicker than most other wheels. At 1-1/8″, the larger size lessens the hand fatigue thats common with thinner styles. UV-resistant black Santoprene rubber provides all-weather control and comfort, and a dramatic counterpoint to the gleaming stainless steel. Underneath, finger grips deliver a sure, solid grip. It extends through the top of the rim, providing additional gripping surface. Standard 3/4″ tapered hub. The durable stainless steel center nut works with all steering systems.