This antenna mount is made ouf of high quality stainless steel. Fits all standart marine VHF antennas with 1'' x14 UNF thread. Appropriate for GPS-antennas as well. Screws are not included in delivery. Length: 100 mm width: 40 mm thread: 1'' x14 UNF thread diameter of drillings ( thread ): 7 mm ( quantity: 6 )