Newwish PFA Tube ID 2.5mm X OD 4mm PTFE Teflon for 1.75mm Filament 3D Printer 3MPFA tubing designed for 3D printers, featuring an inner diameter of 2.5mm and outer diameter of 4mm, specifically engineered for use with 1.75mm filament. This transparent tube allows you to monitor filament movement in real-time, making it easier to detect blockages or feeding issues before they cause printing problems. The smooth interior surface reduces friction, helping filament feed smoothly without catching or clogging. The tube withstands temperatures up to 260 degrees Celsius and higher, matching the heat resistance of standard PTFE tubing while offering improved pounds