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Good luck with your favorite purchasesHign-concerned Chemical : None Model Number : Referee Whistle Brand Name : Shunmaii Origin : Mainland China Referee Whistles : Survival Whistle Extra Loud Sports Whistles : Loud Crisp Sound Whistles Cheer Whistles : Emergency Whistle Origin : Mainland China Model Number : Referee Whistle Product Name : Whistle Product material : ABS plastic Product color : gold, gold and silver(optional) Product size : 6cm/2.36in x 2cm/0.79in