美国采购需求：凸面镜、减速带、电缆保护器、橡胶车轮挡块、橡胶路缘坡道、橡胶车轮楔块

I'm reaching out to gather more details on a few specific components that we're interested in sourcing. Could you provide the latest specs, availability, and pricing for the parts I mentioned earlier? Also, it would be helpful to know any minimum order quantities, lead times, and potential discounts for bulk purchases. Looking forward to your response so we can move forward with our project efficiently. Thanks!