赞比亚采购需求：灌溉蝶阀、球阀、DIN球阀、偏心球阀、控制阀、针阀

I am reaching out to request a detailed quotation for two types of stainless steel valves that we are looking to procure. Specifically, we need a 6-inch ball valve and a 6-inch gate valve, both featuring a design that includes 8 holes. Please provide pricing information for a quantity of four units of each type. Along with the pricing, it would be great to know the estimated lead time for production and delivery, as well as any available options for customization, should that be possible. I'm interested in understanding your payment terms and warranty policies as well. Looking forward to your prompt response with the requested details!