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Continue to ChatPTFE Teflon Tube with PC4-M6 Quick Fitting & PC4-M10 Fitting for 3D Printer 1.75mm Filament https://www.multanelectronics.com/product/ptfe-teflon-tube-with-pc4-m6-quick-fitting-pc4-m10-fitting-for-3d-printer-1-75mm-filament/