Product details:

• Material: aluminum alloy
• Surface treatment: anodizing
• Color: black 
• Suitable for: CR10 Ender 3 etc 3D the short-range extruder, extrude filament and draw back more accurately and with higher precision;
• Increase the pulley to reduce wear and improve stability;
• Compatible with more Filament: such as TPU flexible filament, it is more convenient to replace the filament;
• All-metal structure, easy to replace, increase heat dissipation holes;
• The short-range/long-range extrusion can be switched at any time, which is convenient to disassemble and does not affect the original printer function.

Package including:

• Type A ：1 Set Left hand  Extruder;
• Type B ：1 Set Right hand  Extruder;
• Type C：1 PC Extruder back plate;
• Type D：1PC Extruder back plate + 4Pcs 625ZZ Pulley kit;
• Type E：1PC Extruder back plate + 4pcs 625ZZ pulley kit + 1Set Right hand  Extruder;
• Type F：1PC Extruder back plate + 4pcs 625ZZ pulley kit + 1Set Right hand  Extruder + 1PC 40mm Motor and 100cm Motor cable.
• Type G：1PC Extruder back plate + 4pcs 625ZZ pulley kit + 1 Set Right hand  Extruder + 1PC 40mm Motor and 100cm Motor cable+1 Set  0.4mm/1.75mm 12V OR 24V Printing head heating kit.

NOTE：

Some customers response that you need to make some changes and DLY for some printers extruder，It's very interesting and creative.

If the extruder's position is not aligned with the hotend, moving some millimeters the holes and Not instaling Pneumatic Connectors will correct the problem.

If you face Another problem that the lower wheel nuts are facing the X-axis structure, you can fix it with narrower nuts （thanks for the share and the photos from customer).