The SRA12 Galaxy series satellite radio antenna is designed to recieve Sirius broadcasts up to 200+ miles off shore when connected to a Sirius receiver. Features low profile design, housing constructed of white UV stabilized ASA plastic, & standard 1"-14 threaded base. Comes with plastic flange mount base & 25' low loss micro cable with connectors. Dimensions: 5" Dia x 3.6" (without flange mount). This product ships in approximately 1 days