Yudo Hot Runner India Pvt. Ltd. Offers Precision Mechanical Design System. Yudo Hot Runner India Pvt. Ltd. Has obtained ISO 9001:2000 certifications. Precision Mechanical Design System is designed for high volume production and fast cycle time molding. Precision Mechanical Design System is equipped with pin guide bush which is installed in the head of the nozzle. The pin guide bush of the system ensures that the valve pin is always maintained concentric with the gate. It is available in the brand name of Mass System.