Hand-Selected premium grade oak wood laminated to MDF for beauty and durability. Factory installed hinges ensure perfect alignment between the cover and seat. Simple to install, corrosion proof, self-aligning hardware. Traditional Design Bar Hinge with finish coordinated screws. Multi-coat surface finish provides a beautiful, long-lasting and durable finish. Clean with Warm Soapy Water. Color coordinated bumpers. plated hinges for corrosion resistance.