墨西哥采购需求：不锈钢膜壳，反渗透膜壳

I'm interested in getting a quote for 20 units of a certain type of stainless steel membrane housing. It's essential for our upcoming project, and I'd like to know the pricing options, including any available discounts for bulk orders. Additionally, could you provide information on lead times, payment terms, and shipping costs? It would be helpful to understand any warranty or after-sales support included as well. Looking forward to your prompt response!