• Stainless Steel
• First aid whistle--the sound is loud and crisp, you can quickly catch the crowds' attention anytime you want,sports tool
• Emergency whistle--made of stainless steel, safe, durable and permanent,whistle with lanyard
• Stainless steel whistle--designed with a lanyard, it is easy to carry, or only wear it around your neck,portable survival whistle
• Sports whistle--great for referees alike, the demonstrative shrill cuts through crowd noise and player chatter with ease,stainless steel sports whistle
• Competition tool-- your teachers, referee, teachers or your friends who are a big fan of outdoors activities,outdoors activities accessory