Advantages: High quality, competitive price. 1. We can provide samples for testing. 2. All purity is >99%. As a manufacturer, we can supply high quality products at ex-factory price. Delivery is fast and safe. 1. The package can be delivered within 3-5 working days after receiving the payment tracking number. 2. Safe and prudent transportation methods for you to choose. 3. Customs qualification rate >99%. 4. We have established long-term and stable cooperative relations with DHL, FedEx, TNT, UPS, Hong Kong EMS, etc. If the package is lost, we will replace it for free. Our customers are all over the world. 1. Professional service and rich experience make customers feel at ease, sufficient inventory, fast delivery, and meet customer needs. 2. Welcome to provide feedback on the market and goods. It is our responsibility to meet customer requirements. 3. High quality, competitive price, fast delivery, and first-class service have won the trust and praise of customers. If you need anything, you can contact me at any time. I will reply to your questions in time. Our product quality is very good, you can buy a small amount of samples for testing, and I will give you the best price.