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Check the listing for details. 22PCS 3D Printer Nozzle Cleaning Kit, Kit with 20x 0.4mm... Condition: New. Listed at 16.00 USD. Multifunctional Copper Brush:The included copper wire brush is an effective 3D printer nozzle cleaner. Ideal for scrubbing nozzles, hot beds, and other parts, its fine bristles reach tight spaces to eliminate rust and stains.