The RAM-334-1U consists of a double socket arm, 3.625" square base with the VESA hole pattern and stainless steel double u-bolt base that will fit pipes from 0.75" to 1" in diameter. The VESA base contains a 75mm X 75mm hole pattern. Designed into the mount is a 1.5" diameter patented rubber ball and socket system with adjustment points at both socket ends of the arm. Rubber ball and socket technology allows for almost infinite adjustment and perfect viewing angles.