Hangzhou E cool refrigeration Co.,Ltd strives to be the customer's favored supplier by delivering unswervingly high-quality products, such as gas r438a-r449a refrigerant. We proactively examine any new accreditation standards that are relevant to our operations and our products and select the materials, conduct production, and quality inspection based on these standards.. In order to build confidence with the customers on our brand - Arkool, we have made your business transparent. We welcome customers' visits to inspect our certification, our facility, our production process, and others. We always actively show up in many exhibitions to detail our product and production process to customers face to face. In our social media platform, we also post abundant information about our products. Customers are given multiple channels to learn about our brand.. We have created an easily accessible way for customers to give feedback through Arkool Refrigeration. We have our service team standing by for 24 hours, creating a channel for customers to give feedback and making it easier for us to learn what needs improvement. We make sure our customer service team is skilled and engaged to provide the best services..