This antenna base (1" ID) can be used with any 1" OD stainless steel tubing.
When used with a rail base fitting such as Sea-Dog SS 90° Round Base (item #280901), antenna extensions of any length can be made with a full length internal channel large enough for coaxial connectors.
• Attaches to tubing with two 1/4"-28 x 3/16" set screws (included)
• Threaded for standard 1"-14 threads