This practical boat seat set is a great addition to your boat. Sturdy and durable: Plastic is a versatile material known for being lightweight, durable, and easy to maintain. Additionally, plastic is resistant to chemicals, water, and corrosion, making it suitable for various applications. Long-lasting material: The boat seat base is made of steel, making it robust and designed for a long lifespan. The black powder coating provides extra protection against the harsh marine environment. Comfortable: This boat seat features a backrest that offers a comfortable seating experience all day long and relieves your back. Foldable design: The boat seat is collapsible; the backrest can be folded down when not in use. Height adjustable: This chair leg can be adjusted in height between 28 cm and 45.5 cm to meet different requirements. Practical design: The boat seat base has a form-fitting handle with stainless steel components for added strength and comfort. Universally compatible: This chair leg is suitable for all boat seats with a flat bottom or where the hole size is compatible with ball bearings to meet various needs. Good to know: Mounting screws are not included.