尼泊尔采购需求：护栏，高速公路护栏，W梁护栏，护栏，护栏道闸，防撞护栏

I'm looking to source high-quality sandwich panel roofing for an upcoming project. The panels should be durable and suitable for various weather conditions, ideally with good insulation properties. Please provide me with information on the types of materials available, thickness options, and any customization capabilities. Additionally, let me know the standard lead times for production and delivery. Could you also share the pricing details and any minimum order quantities that might apply? If you have any product catalogs or specifications available, that would be helpful. I'm particularly interested in understanding the performance certifications for the panels as well. Looking forward to your prompt response so we can move forward quickly!