stainless steel half ball surface of radial polishing material is 304, ... 33.7,40,42.450,60,70,80,100, stainless steel half ball surface of radial polishingmaterial is 304,316spec: ... 450,60,70,80,100,solid brass and stainless steel half ball end cap:finish: polished brassDecorative and functional rail end caps ... rail system, or other architectural metal railing project. Nice Round Steel Fence End Cap