Brand: RAM Mounts Manufacturer's Part Number: RAM-B-231Z-2NUBU Part Type: Mobile and Media Device Mounting Accessories Product Line: Ram Mounts ATV/UTV Rail Bases Summit Racing Part Number: RMI-5461 UPC: 793442941047 Mobile Device Mounting Accessory Type: Ball base round shape Ball Diameter (in.): 1.00 Ball Diameter (mm): 25.4mm Quantity: Sold individually. Notes: Model uses a worm screw clamp. Marine-grade stainless steel components and high-strength composite material. Strap dimensions: 1.57 in. to a max of 3.15 in. Ram Mounts ATV/UTV Rail Bases Designed for a clean installation， Ram Mounts ATV/UTV rail bases accommodate most common tubing sizes on ATVs and UTVs， allowing placement of the Ram rubber ball base. With the ball base in place， you'll have the foundation for mounting your GPS device， cell phone， radio―or maybe Ram's self-leveling drink cup holder. Safely concealing a strap clamp in a compact housing， you won't have to worry about exposed sharp edges or unwanted loosening. And， no matter how you decide to use the Ram rail base， you'll wonder why your UTV or ATV didn't come from the factory with this must-have product.