• single base with ball fits rails from 5/8" to 1 1/4 " diameters
• 1 Inch Rubber Ball
• material: Powder Coated Marine Grade Aluminum
• Black Powder Coat colour
• zinc U-bolt
• compatible with each arms for the 1" ball size

Size: 2.38 x 0.87 x 2.85-3.5 inches

Weight: 0.19 lbs

See attached mechanical drawing