This product will wrap around any tube or rail that is between 1" and 2.1" (2.54cm to 5.33cm) in diameter, and has a 1" ball attached which will let you connect to the RAM 1" ball system for mounting electronic devices.

Just place the saddle shaped plate on the rail/tube then wrap the metal clamp strap around the rail and tighten the screw knob on the metal strap with a screw driver.  

• Material: Powder Coated Marine Grade Aluminium 
• Ball Size: 1" Rubber Ball "B" Size 
• Made in the USA and comes with a lifetime warranty

What's Included:

• 1 x 6" (15.24cm) long metal strap
• 1 x 8" (20.32cm) long metal strap
• 1 x 5.5" (13.97cm) rubber strip that supports the metal straps to avoiding scratching or marking of the rail 

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