It is simple to get into and out of the seat thanks to aluminum brackets with moveable arms. The seat has conventional pedestal fixing points and is made of 18mm marine plywood. There is an extra charge for a plastic foundation. 600mm (24") in width, 550mm (21 3/4") in depth, and 520mm (20 1/2") in height is the measurement of the seat. If you wish to match your replacement or current chairs, custom widths are also an option. Please email us at boshuterr@protonmail.com to place your order and obtain further information. The $350 freight charge is included in the price.