Diameter and dish: 355 mm (13.98 in) diameter with a 25degree dish for improved leverage, precise control, and reliable performance steering. Knob design: Ergonomic knob delivers stable control, reduces steering effort, and features antislip slot design for a secure, comfortable grip. Overall design: Fivespoke wheel design that feels soft and comfortable to hold, supporting steady handling during use. Material and build: Made from stainless steel for strength, durability, and corrosion resistance; designed for reliable installation on boats. Use scenarios: Openwater navigation on recreational fishing or cruising boats, where stable control and responsive steering are important. Tightspace docking or maneuvering in marinas, benefiting from the ergonomic grip and secure control. Extendedtime helm operation on small to midsize boats, where comfort and durability reduce user fatigue. Compatibility and performance notes: Specifically designed for installation on boats requiring a 355 mm diameter wheel with a 25degree dish, providing strong, durable performance and reliable function in marine environments. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.