Holland Nihao group, AiBo door closer Co., Ltd, which is located at QingTian Zhejiang & sales devision at HangZhou, we are focuse and professional product door closer & floor spring in past 15 years. we are mainly in research, designing, producing and marketing door closer. Our door closer are popular in all over the world, especially in Europe, south America, Middle East, Russia and so on. we are the leader at technical & quality in China. therefor, many foreign companies preferred cooperate with us.we have 200 staffs & works, factory has 35, 000m2 area, amount of export is more than 30, 000, 000 RMB. We have perfect quality & competitive price, welcome to visit nihao company.