印度采购需求：地脚螺栓、头螺栓、螺母、垫圈、异形工件、墙螺栓

I'm reaching out to inquire about black gypsum screws and hex head SDS. Specifically, I'm looking for details on the available sizes, materials, and any options you might offer for customization. Additionally, it would be great to know about your production capacity and lead times, as I need to plan my inventory accordingly. Could you also provide pricing information for bulk orders? I'm particularly interested in understanding any discounts for larger quantities and shipping options. Looking forward to your prompt response as it will help me make an informed decision on our sourcing needs. Thanks!