GENUINE KARCHER 10 Pk Filter 3 Ply Vac Bag T 10/1 & T 12/1 (6904315 6.904-315.0) 4002667803693 | eBay
HQRP Dry Flat Filter compatible with Karcher 6.904-367.0, 6.907-012.0 fits KM 70/30 C Bp, NT 20/1 Ap, NT 35/1 Ap, NT 35/1 Tact, NT 45/1 Tact, NT 361 ECO, NT 561 ECO, NT611 ECO Vacuum Cleaners - Walmart.com
Kärcher 6.904-290 Paper Filter Bags NT 27/1 Pack of 5