Lead-free, lead-based comprehensive implementation of the quality "six guarantees" service policy: 1. Full bag weight: Eliminate the phenomenon of cutting corners, and pack the full weight according to customer requirements. 2. Insufficient degree: In leaded solder, insufficient degree is included to prevent the wrong version. 3. Replacement: Due to customer order adjustments or inappropriate production and use, we implement a replacement policy. 4. Package return: If you are not satisfied with our quality or service, we implement a package return policy and return the equivalent payment at any time without conditions. 5, package freight: including express delivery, freight or direct door-to-door delivery to achieve rapid service. 6. Resource Recovery: Help customers to recover tin slag (tin wire slag, tin bar slag), etc. at high prices in cash or swap.