technological background from sheet painted metal or plastic bolted. black realistic metallic bluing steel backdrop. blued bolts.

advice backdrop background banner black blank blued blueing bluing board bolted bolts build button cap carbon card closeup construction dark design diagonal empty fastening frame gllossy glossy hardware hat head hex hexahedral illustration industrial isolated label manual matt mechanic metal metallic metalware metalwares modern nameplate painted panel part plank plaque plastic plate polished protection realistic rectangular reliable repair screws shape sheet shiny signboard simple smooth space stainless steel strong surface tag technological technology top vector view vintage wallpaper white