... . 4.Free samples; 5.Thoughtful service. Rivet buttonsMaterial: resin polyester,plastic,metal,acrylic,glass,nut,horn,shell,wooden etc.1; Different sizes ... by our QC.Product Type:ButtonsMaterial:MetalSize:Any sizeButton Type:Rivet ButtonsStyle:shankModel Number:32LFeature: Eco-Friendly, Washable, Nickel-FreeShape:RoundPlace ... :If you have any other question,please let us know. Rivet Button