Compatible Model?Compatible With Dyson Dc41 Dc41 Dc65 Dc66 Vacuum,These Replacement Parts Are Not Compatible With Dc40 Vacuum | | Filtration: Use Premium True Post Filter To Capture Suspended Solids Found Indoors, Reduce Household Odors, And Effectively Absorb And Decompose Residual Odors In The Air | | Package: Includes 3 Pack Post- Filters And 3 Pack Pre- Filters | | Replacement: Easy To Replace, Without The Need For Any Tools. It Is Recommended To Replace Every 2-3 Months According To Usage And Living Environment To Maintain The Best Performance Of The Machine | | Service:If You Have Any Questions About The Product Or If You Have Any Questions After Receiving The Goods, You Can