The RAM-119 tube holder is designed to hold the handle end of your fishing rod. It is an aluminium tube with a 1.5 inch socket at the end, connected to a 2.5 inch round base with a 1.5 inch ball. Tube Dimensions: Inner Diameter: 1.71" Length: 10.0" Height: 14.75" Width: 3.12" Material: Powder Coated Marine Grade Aluminium Fishing Recommendations: The primary intention of this mount is for fresh water usage.