Lalizas has set very high quality standards in manufacturing its products, in order for you to enjoy the best result. Specifically the outer shell of the navigation lights can be either a mixture between Nylon and Plexiglas or ABS plastic, which are resistant to UV rays. Depending on the type and model, the lenses are made from Plexiglas (PMMA), polycarbonate or acrylic, in order to have longevity. The contacts are either stainless steel or brass (new navigation lights). All models have nitrile water resistant seal to provide reliable long life.