Description:High compatibility makes it compatible with multiple models of 3D printers. Simple and convenient assembly will not waste your time and energy.Strict and professional workmanship allows it to be used for a long time. The sturdy shell can protect the its parts inside from damage.Made of metal material, it is very durable to use.The length of this product is 5.12cm and the width is 4.69cm.It is suitable for multiple models of 3D printer.Item Name: ExtruderMaterial: MetalFeatures: Lightweight, Stable Performance, Easy to AssemblySize Details: Size: 5.12cm x 4.69cm/2.02" x 1.85" (Approx.)Cable Length: 120cm/47.24" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Parts Note:Need to modify the E-axis treading value of the extruder. For example, the E-axis jump value of Ender3 is 691.1. The drive current of the extruder needs to be adjusted to 0.35A (Method: adjust the voltage to about 0.28-0.3V or firmware to adjust the drive current of the E axis). The reason for adjusting the current: to prevent the motor from overheating.2. Modify uTerudermethodMethod 1: Firmware modify the pulse method of the extruder pulse: define default_axis_steps_per_unit {80,80,400,691}Method 2: Send G code (can be sent by using Slicing Software command): M92 E691 M500Package Includes:1 x Extruder