越南采购需求：软管防甩装置、软管限制器、防甩安全缆绳、缆绳拉力器、缆绳拉力袜、拖车分离开关

I'm reaching out to inquire about a specific product related to whip checks. I need the nitrogen refill for air pressure application, and I'm looking for several sizes to fulfill our requirements. Specifically, I'm interested in four different dimensions with a total quantity of 16 pieces for each size. Could you please provide details on the availability, pricing, and lead time for these items? Additionally, I would appreciate any information on material specifications and certifications, as we require compliance with industry standards. Looking forward to your prompt response to facilitate our procurement process.