Dongguan City Alliance Hardware Products Co., Ltd. is a professional aluminum ladder manufacturer in Dongguan. ALFA METAL CORP was established in Taiwan area in 1986. In 2004, we registered a company - Alliance International Enterprises Co., Ltd., which is a subsidiary company of ALFA METAL CORP, and transferred our product line to Dongguan, China. We have served clients from all over the world for over 20 years. We offer our items under our own brand name "Prostep", and also offer customized service. OEM and ODM orders are welcomed.