Product introduction  

Product name: Double tube whistle 

Product specifications: 56 x15mm

Product weight: 9.5g                                                                          

Material: aluminum alloy  

Product color: all kinds of color, can also be customized color production.  

Product printing: screen printing LOGO or laser laser LOGO 

Product surface treatment: positive oxidation process (non-electric process)  

Product usage: Outdoor emergency playground training gifts 

Product features: exquisite wear-resisting do not fade environmental protection beautiful super loud cheap price  

Yikai hardware firm adheres to the principle of \"quality first, customer first\". Sincerely welcome customers at home and abroad to visit and patronize!