QIDI TECH High Quality Brass Nozzles (0.4mm) I-Fast, X-Max, X-Plus, i-Mate, i-Mates, X-Smart, X-Maker, X-Pro 3D Printers With PTFE (2pc Kit) 0.4mm MK10 High Quality Brass Nozzles, Hotend Nozzle for 1.75mm Filament. PTFE tubes - ID 2mm x OD 4mm Package include: 2 x High Quality Brass Nozzles - 2 x PTFE Tube . - Please measure the PTFE tubes prior to purchasing. Choose the same length as the provided stock PTFE tube. Please inquire if you have any questions.