This is a brand new foam seal gasket for the cyclone on the for Dyson DC18.
This is the gasket seal that is accessed by splitting the cyclone. Sometimes these degrade and cause cyclone leakage and thus suction loss.
Sometimes when you split a cyclone for cleaning, the old one is unusable rendering the cyclone effectively scrap. However, we now sell the replacement cyclone gasket seals here.
This gasket ONLY fits the DC18 DC25