... hole cones are temperature-resistant silicate fiber products used to block outlets of molten aluminum in all kinds of melting furnaces ... Co., Ltd4,Zhejiang Zhongya Aluminium Co., Ltd5,Luoyang Wanji Special Aluminium Alloy Co., Ltd6,Zhejiang Dingfeng Aluminum Co., Ltd7,Wujiang Longma Aluminum Co., Ltd8,Interthai Manufacturing Co ...