As stated in another opinion, the materials are anti corrosion, it should be noted that LTE provides protection LTE interference: deployment of 4G I, who am not handy at all, the mounting of the antenna made me a little scared. On delivery of the (large) package, assembly or rather the assembly is a simplicity with precise and well detailed explanations. I still had more than to install on the roof with all required safety devices. Recommended without hesitation !!