Welcome to Doublewin Biological Technology Co., Ltd


Q1: Have your Product Quality been Approved by Third Party Lab

        A: Yes, All products are strictly tested by our QC, confirmed by QA and approved by third party lab in China, USA, Canada, Germany, UK, Italy, France etc. So you will be assured with Good Quality if you choose us.

Q2. Are you a manufacturer?
        A: Yes, we have our own factory and lab.


Q3: Is there any discount?
        A: Yes, as for old customers and larger quantity, we always support with great discounts and surprise.


Q4:Do you accept VISA business credit card ?
       A:Sorry we don't accept VISA credit card, we'd like to accept Western Union, MoneyGram, Bank Transfer, Bitcoin, Litecoin.


Q5: How do you treat quality complaint?
       A: First of all, our QC department will do strict examination of our export products in order to reduce the quality problem to near zero. If there is a real quality problem caused by us, we will send you free goods for replacement or refund your loss.

Our Advantages

1. Good quality can be tested .
1) Good quality is the basic of our goal.
2) We can offer samples to be tested.


2. Good feedback.
 1) We are a high-tech company in China for many years.
      2)98% of our products have exported to UK, USA, Germany, Spain, Australia, Middle East and many other

countries. and we have got very good feedback from our customers.


3. Safe and fast delivery.
      1) We have stock, so parcel can be sent out in 24 hours after payment. Tracking number is available.
      2) Customs pass rate ≥ 99%

4. Good after-sales service.
      Tell the package update ASAP, and will try best solve when customer encountered various problems.

Scan Our Wechatclose
Scan Our Wechat