The Pre-Shipment Inspection (PSI) is one of many types of quality control inspections conducted by Dongguan S-King Insoles Limited. With no exception, shoe inserts for height is also inspected for quality control prior to shipment. This inspection is based on the product's Standard Acceptable Quality Limit specification or on customer request. Based on these criteria and procedures, samples are randomly selected and defects are checked. The Pre-Shipment Inspection helps both ourselves and customers to reduce the potential risk of delivery delay or/and fix or redo products. At last, the product will be photographed to ensure that the order is in perfect condition, complete, and properly packaged for shipment.

S-King Insoles is a reliable and responsible manufacturer for its height insoles. S-King Insoles's SHOE TREE series are created based on unremitting efforts. It is characterized by its excellent dimensional stability. It has been processed by annealing which hardens and fixes its structure bonds by heating up to the vitrification temperature or crystallization temperature. Crafted from high-quality materials, S-King insoles show a good durability. As a specialized company, S-King Insoles is highly recommended by customers. The S-King heated insoles keep your feet warm for 4-8 hours per charge.

We are determined to become the leader in the industry and we have strong confidence to accomplish this goal. We will rely on technological innovation and cultivation of the R&D team to optimize our products and strengthen our manufacturing capabilities.