Mainsail Mould are a custom manufacturer of injection plastic mould with the molded plastic components used in a wide of applications within various markets and industries. Located in DongGuan China. At Mainsail, customized quality control programs can include product testing and verification, inspection reports, and quality assurance. By keeping all tooling processes in-house, Mainsail can carefully control every aspect of production, drastically save your value time and money.