This product will attach to bars between 1 1/8" and 1 1/12" (28.6mm to 38.1mm) in diameter and has a 1.5" ball on it. Sizing inserts are included to provide a snug fit and to protect your bar, and the mount uses nylon-insert locknuts to prevent loosening in high vibration environments.

• Mounting Base Dimensions: Accommodates rails 1 1/8" to 1 1/2" (28.6mm to 38.1mm) in diameter.
• Material: Powder Coated Marine Grade Aluminium
• Ball Size: 1.5" Rubber Ball "C" Size

Note: The "U" in the part number reflects product packaged in poly bag.