Color: SilverMaterial: Stainless SteelPackage: BagLocking: Allen KeyHeight: 2 cm/0.8 inchesThickness: 0.5 cm/0.2 inchesFemale SizeCollar: 11.8 cm/4.6" (Inner Dia)Male SizeCollar: 13.5 cm/5.3" (Inner Dia)