Feature a wide low profile cap for excellent mounting strength and to enhance the appearance of any boat. 100% welded cap to tube joint will never break. Super tough 1/4" wide x 1/2" tall gimbal bar will stand up to virtually any punishment heavy tackle or downrigger mounts can dish out. White vinyl liner protects rods and is keyed with the gimbal bar to eliminate liner twist. White liner color316L Stainless steel1-5/8" Inner diameter, Fits 2-3/16" hole diameter1/4" wide x 1/2" wide gimbal bar9" Tube length