WHAT YOU GET--- 12PCS black Thickened plastic whistles with lanyard.LOUD CRISP SOUND--- The whistle has a LOUD CRISP SOUND. You can use it easily and effectively in any situation.HIGH-QUALITY MATERIAL--- The plastic whistle is made of thickened green plastic. They won't break easily!! More durable than other plastic whistles.WIDELY USE--- These whistles bulk are great for referees, coaches, teachers, training, survival, emergency, school, sports, give away etc.GOOD SERVICE--- All our whistles are 100% satisfaction guaranteed. Please feel free to for anything and we usually respond within 12 hours. Product Description We design and produce our whistles using the highest standards. This helps make sure you hear a loud, crisp sound is heard each time. Our whistles can be used easily and effectively in any situation. THICKENED PLASTIC WHISTLES The plastic whistle is made of thickened plastic. They won't break easily!! Our whistles are durable than other plastic whistles. If you are looking for safety whistles for you or your family, our thickened plastic whistles are for you. CONVIENT TO USE A light and comfortable nylon lanyard comes with each whistle. You can wear it around your neck, wrist, or even on your backpack. LOUD CRISP SOUND Whistles with a pea are just easier to use. It’s science! The pea affects the airflow, creating a loud, shrill sound with less air pressure. If you are a coach or a referee and you need a professional whistle, our thickened plastic whistles will be your BEST option. WIDELY USING sports whistle(basketball, volleyball, football, soccer etc.), referee whistle, coach whistle, teacher whistle, guard whistle, lifeguard whistle, emergency whistle, survival whistle, self-defense whistle, police whistle, kid’s whistle, safety whistle, party favors whistle