Main material: brass; bracket base material: 304 stainless steel, aluminum alloy. The steam engine is carefully made with copper, stainless steel, and aluminum alloy. The design is dignified and retro, exquisite craftsmanship, beautiful and beautiful, and the performance and structure are relatively stable. The small boiler is filled with appropriate water, and it can operate normally by heating the small boiler. It is a high-end handicraft for collection, appreciation and gifting.