Xinxiang Haishan Machinery Co., Ltd. provided our company with heavy hammer copper sleeves and guide pillar copper sleeves made of aluminum bronze ZCuAl9-4 for trial use. The trial situation is now reported as follows:


1. This batch of copper sleeves have qualified materials, no defects in appearance, and good wear resistance. Compared with similar products in the market, they have obvious advantages and have been cooperating for many years.


2. No abnormal phenomenon was found during installation and use.