Double Swiveling Base For Radio Antenna Base Size - 63MM x 93MM Overall Height - 115MM Thread - 25MM Drill Hole Diameter - 7MM Material - 316 Grade Stainless Steel These Are Used As A Base For Radio Antennas To Be Attached Too. This Can Swivel In 4 Directions To Allow For The Best Position. These Are Made From Stainless Steel To Protect The Item From Rust. Please Note We Supply A Huge Variety Of Stainless Steel Parts. *** FREE DELIVERY *** Product Code - SFSM49010