This kit includes a Nozzle assembly and two PTFE tubes for use with the 1A, 2A, 1XA, 2XA Extruders for METHOD Series 3D printers. These components require version 1.5 METHOD Extruders which includes a removable cap and set screw - allowing you to manually replace the nozzle and PTFE tube assembly to more easily and affordably extend your extruder's life.