Description Detailed Specs Downloads Reviews Description RAM MOUNT, UNPKD RAM 4IN DIA. RISER PLATE Detailed Specs MFG Part Number RAP-402U Product Type Accessory configuration Ram Mounts, UNPKD RAM 4IN DIA. riser plate null null null null null null null null null null Downloads Reviews The Ram Mounts RAP-402U is also known as RAM -RAP402U or RAP402U