Most international demand is for iron (steel) products. However, customers in Southeast Asia and parts of the Middle East often require stainless steel (typically Grade 201 or 304). Specifications and dimensions vary by product and can be adjusted based on customer needs. Regarding certifications: our products have passed SGS testing. While we don't hold all certifications currently, we are happy to cooperate and complete any required testing for specific orders. High quality involves higher costs, which will be reflected in the pricing.