Heavy-duty marine grade cast aluminium base with 6 x 8mm mounting holes.
Friction clamping top with slide and swivel.
Moulded nylon cup insert provides a smooth swivel performance.
Highly polished aluminium post.
Powder coated aluminium swivel.
Cushion of air smooths out bumps while travelling over waves.
Gas assisted adjustable height.
Takes a 60.3mm (2-3/8″) diameter seat slide/swivel.