I have a Shark Rotator Professional Lift-Away NV-502 and I need a new filter. Mine was all brown and dusty. I cleaned it about 3 times, dipping it in water and squeezing it out like a damp sponge on both the sponge filter and the small patch filter. I wanted a spare set in case I need to dry another set and want to use the vacuum or the occasional filter breakage. This filter set includes everything you see in the picture, 6 filters in total. For me they fit perfectly and I didn't have to cut or modify them. The flat round filter may be a bit larger than the original, but that's not a problem and it still fits great. After installing these filters, I heard more suction and smelled a new vacuum. This works very well. The only thing I didn't do was clean the canister of dust that got stuck in the canister. The filter quickly turned brown because I didn't. I rinsed and cleaned the reservoir like new and then put it back in place. The cylindrical filter is a bit brown, but still does the job. I recommend cleaning the canister thoroughly before installing the filters. The installation is very easy. I think I cleared all the mines in a minute or so. There are many brands and companies that make different filters, so it's difficult to know which one to choose. I have read various stories about the filters not fitting or shipping taking too long because they are from China. So I took a chance and just bought this kit and this kit works great. It didn't fit super exactly like the original, but it did. The heavy-duty front cardboard filter fits easily. The other two are slightly larger than the original but fit well. I wish sharks had replacement filters when they bought their vacuums, or my local shark retail stores stocked them. These filters do their job, however. I keep my original old dirty filters just in case.