Description: Durable and compact 5 spoke boat steering wheel. Included black center cap. 13.5" Diameter. Universal fits standard 3/4" ( 19 mm ) tapered shaft. Easy to install. Commonly used on most marine boats, vessels, yacht, pontoon boat and so on. Specification: Material: Stainless Steel Color: Silver Steering Wheel Outer Diameter: Approx.13.5 inch Center Hole Inner Diameter: Approx. 19 mm/0.75 inch Package Includes: 1 Piece Boat Steering Wheel Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!