Securely mount your marine navigation pole light with confidence using the Perko 1048P0SDP Threaded Collar Pole Light Mounting Base — a rugged, stainless steel plug‑in base designed for reliability in demanding marine environments. This mounting base is engineered to provide a solid foundation and dependable electrical connection for compatible Perko all‑round pole lights on vessels up to ~20 m (≈ 65.6 ft.) in length