DX Engineering Radial Plate Adapter Kits allow you to adapt the discontinued model RADP-1P radial plate to antenna mounting pipes in the range of 2.375 in. to 3 in. O.D. Some larger vertical antennas require a larger, more substantial ground mounting pipe or tubing. These adapter kits come complete with a stainless steel V-clamp, a rugged stainless steel adapter plate, and stainless steel hardware for connection to your older DX Engineering Radial Plate.