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I'm interested in understanding more about the quality standards your products uphold. Specifically, it would be great to know if you have any certifications or quality assurance processes in place. Additionally, if you could provide details on your testing procedures and any guarantees offered, that would be really helpful for us in making an informed decision. Furthermore, I'd like to explore the payment options available for our potential orders. Are you accepting credit cards, bank transfers, or any other methods? Also, do you require a deposit or full payment upfront? Understanding your terms would help us streamline the purchasing process if we decide to move forward.