美国采购需求：脚轮，万向脚轮，固定脚轮，医疗脚轮，导电脚轮，TPR脚轮

I'm inquiring about a specific swivel stem castor HD wheel, as I'm looking to purchase additional units to meet our needs. Unfortunately, I can't attach a photo here, but I have a new one on hand that can help clarify what I'm looking for. The product currently in use has a distinct marking, which might assist in identifying the exact model we require. Please get in touch with me via my email address to discuss further details. It would be great to understand your pricing, availability, and any bulk order discounts you might have. I'm looking forward to your prompt response so we can expedite this process. Thank you!