毛里求斯采购需求：UPVC花园围栏

I'm looking for a reliable supplier for hot dipped galvanized square tubes. I'm particularly interested in understanding the different specifications you offer in terms of size, thickness, and finish. It would be great if you could provide details on your minimum order quantities and any customization options available. Also, please let me know about your pricing structure and lead times for delivery. I'm keen to understand the quality certifications you hold, as ensuring a high standard is crucial for our projects. If you have a catalog or sample products available, I'd love to check them out to aid in my decision-making process.