孟加拉采购需求：尼龙拉链，产品

I'm interested in sourcing nylon zippers specifically designed for school bags. The zippers should be durable and suitable for regular use, as they'll be incorporated into products that kids will carry daily. The color I'm looking for is black, which is versatile and popular among students. Regarding the size, I need a standard measurement that typically works well for this type of application. Please provide information on your available options, including pricing, minimum order quantities, and lead times. Additionally, if you have any samples or product specifications, that would be greatly appreciated. Looking forward to your prompt response!