阿富汗采购需求：水脱色剂，聚DADMAC，DADMAC，PAM-聚丙烯酰胺，聚胺，PAC-聚合氯化铝

I'm reaching out to inquire about your current inventory of the Back product line. We're looking to understand your pricing, available sizes, and lead times. Could you provide details on any new versions or improvements made to these products? Additionally, if there are any ongoing promotions or bulk order discounts available, please let me know. It would be great to receive a catalog or spec sheet for a more comprehensive view of what you have on offer. Looking forward to your response!