Product Name: Titanium whistle Size (mm)Length: 40mm,Thickness2.3mm.Width:25mm,Net weight:5.2g Brand Name: JIAXINTI Material: Titanium alloy Color: Natural color Certificate: ISO9001:2008 Specifications * Light weight and hard surface * Eco-friendly * Harmless to skin * Corrosion resistance * Rustproof, never rust * Unique design and excellent workmanship * Top quality