This filter / collection unit is specifically designed for the RRP rated HEPA 7 Gallon High Capacity Vacuum. This 7 gallon filter / collection unit comes with it own HEPA filter inside each unit. It has never been easier to change out when full, unsnap the vacuum from the top of the filter and safely dispose of it, install a new filter / collection unit and you are ready to continue with your project. Each unit has its own new HEPA filter inside of it which will always keep your vacuum running at peak efficency. Each unit holds approx 6.5 gallon of waste and is designed for those larger jobs that you need a through cleaning with no worries. (421-000-007)