Our quality control activities are consistently carried out from the stage of designing and raw material purchase to the end of the service life of our products. The chemical composition, mechanical properties, appearance and dimension of raw materials, and various characteristics of needle quality, including the appearance, size, shape, plating conditions, and heat treatment of the finished products, are strictly controlled and precisely tester. We are always inspecting every piece of our needles to get rid of any defective products. The reliability of our quality guaranty system has been well known to our customers.