Item:plastic pealess whistle LS5073 size:54*21*22mm ABS material 3-chamber, loud sound Item number: plastic pealess whistle LS5073ABS materialFeature: pealess, 3-chamber, loud sound and no moving parts to freeze, jam or deteriorate, designed to self-clear in water, with split ring attachment.LOGO: printingfunction: referee, sport game, life-saving, army, training etc pealess whistle LS5073