PFA Tube: PFA is our latest production of a transparent heat-resistant pipe, We strive to choose better materials, slower production rates, so that this tube has higher transparency and more precise tube diameters. After-sales guarantee: each defective item can be replacement for free or refund. If any question, please feel free to contact us, Newwish 3D is committed to providing you with the best service! Specification: High Transparency PFA Tube, Heat-Resistant (260℃+), ID 2.5mm X OD 4mm for 1.75mm filament, can effectively replace the PTFE tube, its heat resistance is consistent with the PTFE tube, and it can be placed in the extrusion head position of the 3D printer. High Transparent: This highly transparent tube allows real-time monitoring of filament movement, making it easier to quickly detect blockages or anomalies. This significantly reduces downtime and improves the reliability of your prints. An ideal choice to fine-tune your settings and optimize the calibration of your 3D printer, while ensuring more precise results. Smooth Interior: The smooth inner space will more effectively reduce the frictional resistance of the filament inside the tube. All kinds of filament can be pushed smoothly without causing blockages！ High Stability: ID 2.5mm, the inner diameter of the tube is appropriately increased, while ensuring good printing accuracy and filament flowability, balancing the risk of clogging and the resistance in filament feeding. Suitable for high flow and high-speed printing. Suitable for Bambu-Lab series 3D printers. Compatible with all 1.75mm filaments, suitable for most 3D printing needs. Summary and Suggestions:

Inner Diameter 2mm:
Suitable for users with high printing accuracy requirements. Smaller gap can reduce filament fluctuations, ensuring more stable filament feeding in high-resolution printing jobs with high detail requirements.
Compatible with all 1.75mm filaments, especially suitable for printing flexible filaments (TPU, TPE). Note: Not suitable for high-flow, high-speed printing, Not suitable for Bambu-Lab series 3D printers.
If your printing needs are high flow and high speed printing, a tube with an inner diameter of 2mm may restrict the filament flowability. This may cause greater resistance during filament feeding, especially when conveying over long distances.
Suggestions to use a tube with a larger inner diameter (ID 2.5mm or 3mm) to ensure sufficient flow and avoid blockage and uneven extrusion during printing.

Inner Diameter 2.5mm:
The inner diameter of the tube is appropriately increased, while ensuring good printing accuracy and filament flowability, balancing the risk of clogging and the resistance in filament feeding.
Suitable for high flow and high-speed printing. Suitable for Bambu-Lab series 3D printers. Compatible with all 1.75mm filaments, suitable for most 3D printing needs.

Inner Diameter 3mm:
Due to the larger inner diameter, the filament flowability more high, making it suitable for long-duration printing or applications requiring reduced feeding resistance. Suitable for rigid filaments (such as PLA, ABS, PETG, TPU, PC, Nylon, etc.)
Note: Too large a gap may cause the filament wobbling, resulting in uneven feeding, which is not suitable for high-precision requirements or flexible filaments.
Please choose according to your needs.

Package Includes:
1.2 Meters PFA Tube (ID 2.5mm OD 4mm)