How do you conduct quality control for bulk orders?

A1: Before starting mass production, we provide all customers with pre-production samples for confirmation. Each batch of products undergoes a comprehensive visual inspection and dimensional sampling inspection before leaving the factory; simultaneously, we monitor key dimensions in real time during the production process. A2: Before shipment, we provide all customers with complete quality documentation, including dimensional measurement reports, material data sheets, Certificate of Origin (COO), and Certificate of Analysis (COA). A3: We accept third-party testing, such as from SGS, TUV, Intertek, BV, etc.