tons.3. What 's the leading time?35-60 days after receiving payment.4. How to order？Please place an order by Email (xilejia@xilejia.com)5. What’s the warranty?2 years.PS：We can design separately according to customers' special requirement.PS：We can design separately according to customers' special requirement.The Principle of Unit PartitionProduct certification unit refers to the basic unit of product certification.The product of the same production enterprise, the same production address,