HQRP 1 HEPA Filter + 2-pack Foam and Felt Filters; | | Compatible with Shark DuoClean NV830 series models; parts # XHF650 and XFF650 Replacement; | | Compatible with Shark Rotator APEX DuoClean Powered Lift-Away Vacuum models NV650, NV650W, NV651, NV651Q, NV652, NV750W, NV751, NV752, NV752BRN, NV765, NV831, NV835, AX950, AX951, AX952, AZ1000W, AZ1002, AZ1002BRN; | | Washable and Reusable; It is recommended that the filters be cleaned every 1-2 months for best performance, and make sure they are dry before re-installing. Do not operate the vacuum with wet filters! | | Made of high-strength and environmental protection material. | |