Confirm the mould steel grade (e.g., P20, 718, or S136); stainless steel like S136 is preferred for toys requiring a high-gloss finish or those using corrosive resins. You must also ensure the mould is compatible with your existing injection molding machine, specifically checking the mould dimensions, locating ring diameter, and ejector pin layout. Additionally, verify that the mould is designed for the specific plastic resin you intend to use (e.g., ABS, PP, or PVC) to account for proper shrinkage rates.