Minimum Order Quantity (MOQ) requirements apply to all orders. For general instruments, the MOQ is one (1) unit per instrument, while for special items, it is determined on a case-by-case basis. All instruments come with a one-year guarantee against rust, corrosion, pitting, or any other manufacturing defects. Shipping time for in-stock products is typically 4-6 working days, whereas out-of-stock items require approximately 20-30 days, depending on order size and product complexity. However, for regular customers, we maintain a customer-specific inventory to significantly reduce shipping time. Delivery time varies by region but does not exceed 10 days, with an average of 6 working days through trusted couriers like DHL, FedEx, and UPS. International buyers are responsible for any customs duties and taxes applicable in their country, as we are not liable for customs fees or clearance delays.