New fuel line retainer clip.  These are commonly used on GM 1999-2014 LS and 1992-1997 LT engines for the fuel lines, emission lines and fuel filters.  These are only used on hard lines (metal), and not for use on the nylon (plastic) lines.  This clip is for 5/16" (8mm) lines.  These are also replacement clips for the fuel line adapters we sell to convert the factory fuel lines to AN.  Clips are sold individually.