孟加拉采购需求：取芯钻头、取芯钻头、金刚石取芯钻头、湿式取芯钻头、干式取芯钻头、取芯钻头

I'm looking for core bits in various sizes for an upcoming project. Specifically, I need several diameters along with a longer length option that accommodates specific hole dimensions. Could you provide details about your availability, pricing, and lead times for these items? Additionally, I would appreciate information on any material options or special features you might offer, as well as quantity discounts if applicable. I'm eager to explore potential collaboration and see how your products can meet my project's needs.