Built for the saltwater environment with anodised aluminium, glass filled nylon and stainless steel materials. Solid construction, 73mm x 3mm base tube, 66mm x 3mm top tube, both internally rib reinforced, heavy duty die cast alloy base and heavily reinforced glass nylon swivel head assembly. Mount base suits countersunk screws or hex head. Used to convert dinettes into bunks. Height is adjustable via a simple friction locking handle. The telescopic centre tube retracts through the floor and requires 173mm clearance below the floor. Adjusts from 340mm to 680mm above floor.