Description: Made of 316 stainless steel, highly polished Base measures 3.54" x 2.48" / 90 x 63mm Fits all standard 1" marine antennas Dual swiveling ratchet design Heavy duty construction for tough conditions Mount with 1/4" FH fasteners (Included) Package Includes: 1 Piece Marine Antenna Base 4 Pieces Screws Note: Please allow slightly difference due to manual measurement. Color maybe slightly different since different monitor. Thanks!