美国采购需求：浴室安全，扶手

I'm interested in your 24-inch wooden shower grab bars and have a few questions regarding their specifications and safety. First off, can you confirm if these grab bars are designed with safety in mind? I'd like to know what type of wood is utilized and the finishing process. Additionally, how does the grab bar withstand repeated exposure to moisture? Is there any concern about decay or deterioration over time? Moreover, I'm curious about the metal components involved. What kind of metal is used in the mounting brackets, and how are these bars securely affixed to the wall? Lastly, please provide the load limits you recommend for these grab bars. Ensuring that they can safely support the intended weight is essential for my purchasing decision. Thanks!