"Main Filter Element service part for ENTARON XD 21 -The high-performance filter media achieves a long service life and separation efficiency above 99.99 percent offers long service life -Robust element design for all operating and service conditions -The glue string technology fixes the tops of the pleats and therefore ensures that the element offers high performance under all operating conditions -Easy tool-less element maintenance -Element cleanable -Metal free and fully incinerable with low-cost disposal "