Description Detailed Specs Downloads Reviews Description RAM MOUNT, DBL. BALL BASE W/1/2" NPT HOLE NF Detailed Specs MFG Part Number RAM-217-3U Product Type Accessory configuration Ram Mounts, DBL. ball base W/1/2" NPT hole NF null null null null null null null null null null Downloads Reviews The Ram Mounts RAM-217-3U is also known as RAM -RAM2173U or RAM2173U