This is a door trim panel retainer. Useful for a variety of applications, it is OE for GM models (1991-present, Saturn).  It matches GM OE Part Numbers 21042045, 21042053, 21042058 & 21042104. Although this retainer is OE for GM vehicles, it is universal and can be used on any vehicle or application requiring this type of retainer and meeting these specifications.
                                                                                    Material: Nylon
                                                                                    Fastener Type: Double Head
                                                                                    Top Head Diameter: 13MM
                                                                                    Bottom Head Diameter: 20MM
                                                                                    Stem Diameter: 8MM
                                                                                    Stem Length: 18MM
                                                                                    Color: White
                                                                                    Matches OEM Part Numbers: GM: 21042045 & 21042053 & 21042058 & 21042104