Designed for a clean installation the RAM UTV strap mount will acmodate most mon roll bar sizes on UTV"s allowing for the placement of the RAM rubber ball base. The RAM UTV strap mount can also be attached to smaller diameter handlebars on ATVs using the included hardware. With the ball base in place you have the foundation for mounting everything from GPS Devices RAM Aqua Boxes Spotlights and Radios. Strap Dimensions:1.57" (40mm) to a maximum of 3.15" (80mm) Material: Powder Coated Marine Grade Aluminum Note: The "U" in the part number reflects product packaged in poly bag. Product : RAM MOUNT RAIL ATV UTV MOUNT W/ DIAMOND Manufacturer : RAM MOUNT Manufacturer Part No : RAM-B-149Z-2U UPC : 793442925245