titanium whistle: weight:4.2g Size:7.4*50mm Features, 1.material-titanium alloy GR5 2.many colors can be choosed, titanium whistle:weight:4.2gSize:7.4*50mmFeatures,1.material-titanium alloy GR52.many colors can be choosed,3.we can print your logo on the whistle ,all OEM order are available