1.[Quality]: These replacement parts are made of materials and are durable. Your vacuum cleaner will have the same cleaning effect as the original one, keeping your home clean. 2.[Compatibility]: All parts are compatible with MAMNV BR150/BR151, ZCWA BR150/BR151, ONSON BR150/BR151, GTTVO BR150/BR151 and MANVINS G20 Robot Vacuum Cleaners. Please note that this is a replacement product, not an OEM/ODM product. Please make sure your model is one of the ones mentioned before purchasing. 3.[Effect]: To ensure optimal cleaning performance, it is recommended to regularly check and replace these parts of your vacuum cleaner. For maximum efficiency, it is recommended to check the filter every 3-6 months (depending on air quality and usage). Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.