HANGZHOU LIZHAN HARDWARE supplied us bad quality screws. The fact of delivery of defective products is not recognized by the Hangzhou Lizhan Hardware. From the replacement product and compensation of expenses they are refused. We asked for a discount on a new quality party. The supplier said that will give a 10% discount. However, at the same time gave to our partner offer cheaper than to us with discount. Referred to incorrectly sent price-sheets. According to the results of testing by independent laboratories proved that the most part of the goods was not really qualitative and doesn’t correspond to the standards DIN EN 180 15480, DIN EN 180 10666. There are deviations from the geometrical parameters, mechanical properties do not correspond to norms. Test results were provided in the original in Russian and English languages. Only screws size 4,8*29 correspond to the requirements of DIN EN 180 15480, DIN EN 180 10666. The total number of defective goods is 3083.2mpcs cost 40234 US dollars (forty thousand two hundred thirty for).