沙特阿拉伯采购需求：a53管、csl管、灌浆管、直缝埋弧焊钢管、无缝管、钢管桩

We are looking for your best price on specific materials needed for our project. Our requirements include CSL tubes with a length of 5.8 meters, a diameter of 50mm, and a thickness of 1mm. Please ensure the tubes come with a complimentary rubber washer and have waterproof capabilities up to 200 meters. Additionally, they should have a fixing ear and a loading capacity of 70 meters when filled with water. The total quantity needed is 5,800 pieces. We also require end caps suitable for the CSL tubes. The quantity for these is 800 pieces. Please provide a detailed quote including pricing, lead times, and any additional terms related to this order. Your prompt response will be appreciated as we aim to move forward with our procurement process efficiently.