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HeFei LongBin Chemistry Co.,LTD
*Free Pre-Sales Consulting / Free Sample Marking
Longbin offer 12 hours quick pre-sales response and free consulting. Any kind of technical support are available for users.Free Sample offer;
*Strict Quality Control of Production
Each batch chemical offer factory COA according to our industry standard, or order standard.
Each batch goods keep samples for double check.
If you have any doubt about purity, welcome feedback to us, we will respond it within 24 hours.
We have mass production and stock & ready item, for these items, we offer 1 week quick delivery time. For big quantity and special requirement, we will trade you as the priority customer and to produce your cargo in the first time.
Upon receiving user’s notification, we ensure respond within 24-hours.
If you have any doubt about quality, we will cooperate with you to confirm the true quality;
If the quality is not qualified, we will change the goods free of charge.