Karcher Wet-Dry Vacuum Replacement Filter Cartridge for WD 4, WD 5 and WD 5/P 2.863-005.0 - The Home Depot
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Filter | Kärcher International
GENUINE KARCHER Round Cartridge Filter NT 27/1 & NT 48/1 6414552 4039784058484 | eBay
For Karcher Wet & Dry Vacuum Cleaner Cartridge Filter With Locking Nut 5057726085601 | eBay