- Color: Silver<br />- Material: Aluminum alloy<br />- Size: 4.7 x 0.9 x 0.9cm<br />- Great whistle for sports competition、 travel outdoor use<br /><br />                                                                                                                                Dimensions: 1.81 in x 0.31 in x 0.31 in (4.6 cm x 0.8 cm x 0.8 cm)<br />Weight: 0.78 oz (22 g)<br /><br />