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2pcs MK8 Brass Nozzles PTFE Plated MK8 Copper Nozzle For 1.75mm Filament Print Head Extrusion Part 3D Printer Parts Head Surface of nozzle head: PTFE Plated(The surface of the nozzle head is plated with PTFE which is so smooth that it can prevent remaining filament from sticking to the nozzle.) Size:0.2mm/0.3mm/0.4mm/0.6mm/0.8mm/1.0mm/1.2mm Support: Wholesale & Retail Feature:anti-oxidation, smooth inner wall for uniform extrusion, no blocking, high hardness and wear-resistance