The RAM Mounts RAM-247U-15 is a genuine RAM Mounts C-size 1.5 inch diameter rubber ball base designed for secure attachment to rectangular tubes. This robust mounting component is constructed from marine-grade aluminum, ensuring durability and corrosion resistance. It provides a stable platform for various RAM Mounts components, allowing for versatile device mounting in agricultural, industrial, and other demanding environments. The base is compatible with rectangular tubes ranging from 0.5 inches to 1.5 inches in width and 1 inch to 1.8 inches in depth. It is an essential part for creating custom mounting solutions on roll bars, racks, or other tubular structures.