Features Fast Heating: The assembled MK8 extruder and ceramic insulation cotton can ensure that it can be heated to high temperature quickly and stably. Aluminum Alloy Material: Made of premium aluminum alloy material, this extruder has good heat dissipation, and large torsion. High Speed Work: The maximum flow rate of the extruder is 100mm/s, which supports high speed printing. Applicable Models: This extruder kit is suitable for Prusa i3 3D printer, check the model for better fit! Ideal Replacement: This extruder supports high speed work, which is an ideal replacement for the old and damaged parts. Specification: Item Type: 3D Printer MK8 Extruder Kit Material: Aluminum Alloy Extruder Head Size: Approx. 1.75 x 0.4mm / 0.07 x 0.02in  Package List:1 x 3D Printer MK8 Extruder 1 x Flat Cable Package List 1 x 3D Printer MK8 Extruder 1 x Flat Cable