Starlink Modular Top Plate with Starlink Stainless Steel 1"-14 Threaded Adapter & Stainless Steel BaseStarlink quick-release top plate for Seaview "M1" and "M2" style mounts.Features:316L stainless steel Starlink adapter with a 1"-14 threaded fixed base on ¼” aluminum plateThe top of the adapter is machined to fit the Starlink antenna postThe adapter with the fixed base and modular plate is 4 1/4” tallThe ¼” aluminum plate is powder-coated white and can accommodate a Seaview light bar