I ordered these to compare with my original Dyson parts which needed replacing. The filter and pre-filter replacement parts in my animal Dyson DC41 - they appear to be of the same quality as the original parts that I have previously replaced with Dyson parts. Getting new filters has taken Dyson suction to a whole new level. I washed and dried the parts beforehand, but getting these spares is much better. I love having 2 pre-filters as I don't have to stop vacuuming for 24 hours between rinses!