葡萄牙采购需求：压力调节器、泄压阀、快速接头、管接头、管道接头、歧管

I am reaching out to inquire about the availability of a double-ended cylinder that has a 10-litre capacity. It's essential that this cylinder is designed to withstand a maximum pressure of 300 bar. Additionally, I would appreciate it if you could provide details on the specifications, materials used, and any relevant certifications. Understanding the lead time for production and delivery would also be helpful for my planning purposes. Thank you for your assistance, and I look forward to your prompt response.