Dear Puvanart,
Thanks for your efforts in pushing sales of our cysteamine HCL. Of course, we'll do our best to support you.
5kg bag is available. Normally, the price of 5kg bag is higher than the 20kg bag. To show our sincerity, we accept the price 5.50 for the small pack. We hope for win-win finally.
We send you the proforma invoice soon.
Best regards