Aluminum collar stays size:2.0" 2.5",2.75",3.0" ... mm Plating:any color you like, engraving logo Specifications:Aluminum collar stayssize:2.0" 2.5",2.75",3.0"width ... :any color you like,engraving logo Jewelry Type: Stainless steel collar stays Material : 316L S.Steel , 304 S.Steel, Titanium,Workmanship ...