Check the listing for details. Teflon Guide Tubes or Makerbot Method Extruders (10 Pack). Color: White, Condition: New. Listed at 18.99 USD. Ten (10) Precision manufactured Replacement Teflon liner tubes for your Makerbot Method, Sketch 3D printer extruders these guide tubes are replacements for the wear surfaces used with abrasive filaments in the extruders used with the Makerbot Method and Sketch 3D printers. Guaranteed to fit these Method C and Labs extruders which use a PTFE liner. Replace your extruder liner tubes regularly, for improved printing quality, fewer print failures, less extruder clogging, and longer life. These are third party replacement ptfe guide tubes, manufactured from American made ptfe, manufactured in U.S.A. These liners ship same day with fast delivery and guaranteed quality. TabSynth Design works is the manufacturer of these guide tubes and is in no way associated with Makerbot. All trademarks are for reference only, and do not imply any endorsement from the printer manufacturer.