Customized Metal Whistle Outdoor Referee Silver Gold with Logo Whistle

This zinc alloy referee whistle is made of high quality zinc alloy material and precision casting process, which can be supplied in a variety of specifications according to users' needs, with customizable sizes and laser customized logos, suitable for referees, coaches and athletes for professional matches and daily training, and optimized inner cavity design ensures clear high-decibel sound when blown, which can easily convey signals even in noisy environments. This custom metal whistle is not only a high-performance sports item, but also a highly commemorative promotional gift, suitable for users who pursue quality and personalization.