Constituted of grade stainless steel 316, this hinge is resistant to and rust, making it absolute best to be used in marine environments. Whether you are installing a new door replacing an old one, this hinge is absolute best for any marine application. This hinge is idealfor somebody who needs a reliable and long lasting hinge that may face up to the rigors of marine use. The stainless steel 316 hinge is absolute best for somebody on the lookout for a hinge that may face up to harsh marine conditions. With its superb resistance to and rust, this hinge is the very best choice for somebody on the lookout for a reliable and long lasting hinge.