... 16949:2009 3)Warranty,1 year 4)MOQ,1 piece City bus calling buzzerbig one size:114*36small noe size:83 ... We are OEM suppliers of bus spare parts for Kinglong, Golden Dragon,JAC,Ankai,Higer,Sunlong, bus,such as headlight,taillight ... also cooperate with GAC Gonow, Sichuan Automobile and Jiangsu Joylong. City Bus Calling Buzzer