Flat pleated filter Dry made of cellulose fiber material for vacuuming fine dust and coarse dirt of dust classes L and M. Suitable for dry fine dust and coarse dirt. The dust separation efficiency is 99.9 percent. Drying after vacuuming liquids is recommended. The green label serves for differentiation. The Flat pleated filter Dry is included in the standard delivery of Kärcher's NT 14/1 and NT 22/1 Ap Bp wet/dry vacuums. Made from cellulose fiber material, it impresses with a dust separation efficiency of 99.9 percent and is suitable for safely vacuuming dry fine dust and coarse dirt of dust classes L and M. To maintain full suction power, drying the filter after vacuuming liquids is strongly advised. To avoid confusion with other filters, the Dry model features a green label.