Zhengzhou Kovi Machinery Co.,Ltd is a machinery manufacturer. we have independent production reseach and development capabilities, you can get the best price without middlemen.We are welcome you to visit our factory.Kovi Machine,Your Best Choice! Fast delivery and test and adjust machine working well before delivery Supply manual book and technical support in order to use well offer install pictures step by step or videos and dispatch the engineer Guarantee time is one year.during one year.offer the spare parts for free.