埃及采购需求：护膝、护膝、护膝、膝盖保护器、膝盖保护、铰链式护膝、护踝

I'm interested in getting detailed pricing and specifications for your range of sports protection items. Specifically, I'd like to know about the materials used, size options, and any certifications or standards these products meet. Additionally, if there are any promotional offers or bulk purchase discounts available, please let me know. I'm looking to make a decision soon, so your prompt response would be appreciated. Thanks!