Main purpose:The large-capacity dust bag of Proscenic M7 Pro M8 Pro Robot Vacuum Cleaner can free your hands for a month, and never have to worry about frequent replacement. The recommended replacement period is 1 monthMain material:The combination of non-woven fabric and meltblown fabric material, so that you are not afraid of leakage, so that everyone can use it with peace of mindProduct size:Please see the main picture for the size and set combination. If you have any questions, please contact customer service, and all your questions will be resolved.Applicable models:For Proscenic M7 Pro M8 Pro Robot VacuumAbout accessories There are 3 sets of dust bags to choose from. Please check the quantity carefully when purchasing.