Manufacturers are suggested to use bi-injection way to produce two-color non-slip potty training seat, which may make products with better appearance and helps save time and manufacturing cost a lot. However, the traditional way: over-molding is appropriate for manufacturers who have single-color plastic injection machine only. Either produce products by bi-injection or over-molding, the molds should have high quality and precision to ensure the production being smoothly and efficiently. Welcome to contact us, we are experienced, professional and reliable.