Compatible Models: Specifically designed for Xiaomi Mijia M40S OV31CN robot vacuum cleaners. Offers a precise fit for the clean water tank, ensuring stable performance and an easy, worry‑free replacement experience at home. High Efficiency Filtration Capacity: The water tank filter plug uses premium filtration materials to effectively capture dust, fine particles and impurities before they enter the clean water tank. By keeping the water source cleaner, it helps protect the internal components, reduce blockages and extend the overall service life of your robot vacuum. Durable, Reliable Materials: Constructed from high‑quality, wear‑resistant plastic and sealing components, this inlet filter plug withstands frequent filling, emptying and daily cleaning cycles. The robust design resists deformation and cracking, helping maintain a tight seal and consistent filtration performance over long‑term use. Easy to Install and Maintain: No tools or professional skills are required for replacement-simply remove the old plug and press the one into place. Regularly checking and replacing this small component helps maintain strong suction, stable mopping performance and reliable water flow, keeping your robot vacuum working like . Color:Light Blue Material:ABS Specification:1 piece Package Contents: 1 x Clean Water Tank Inlet Filter Plug