The Numatic Tritex 604165 is a genuine Numatic part that can be swapped out when the original filter becomes clogged or damaged. The filter is 305mm in diameter and will fit multiple Numatic henry vacuum cleaners that has a 305mm tub.
The filter should be brushed off by hand during each bag change to ensure that it continues to produce the renowned Numatic performance.
Please Note that this filter is NOT washable.