, none need for professional tools, simply replace to restores the best of the rice cooker Make of food grade, it is wear-resistant, and deformation resistant, ensuring that it remain in good condition even after long-term use The exhaust valves of the rice cooker is designed to be simple, easy to disassemble and clean Daily maintenance only requires rinsing with water to maintain cleanliness Three models of large, mediums and small are available, suitable for various types of rice cookers Adopting advanced exhaust technology to ensuring timely release of excess during cooking and food spillage