Creality Official E·Fit Extruder Dual Drive Feeder with High Torque Stepper 3:1 Gear Ratio Support Bowden&Direct Extrusion Upgrade Kit for Ender 3/Ender 3 V2/Ender 3 Pro/CR 10 3D Printers

The Creality Official E·Fit Extruder is a must have for your Ender 3. It utilizes a 3:1 gear ratio and it is equipped with a high torque stepper motor. One of the best aspects of it is that it supports both Bowden and direct extrusion setups. It has a quick release which makes disassembly easier and allows for quicker swaps of the hot end.With the 3:1 gear ration it will grip the filament tighter so there will be less of a chance of it jamming. If you have an Ender 3 or CR-10` series, then you should get one of the Creality Official E·Fit Extruders. I highly recommend it!

Cannot be used with Spider hotend as that does not have a threaded inlet for the filament. There is no way to mount it to the extruder without that. You may be able to make a custom fit for a CR-10 v2, but it won't work out of the box. You'll need to do something for the part cooling, and the included PTFE stub tube is way too short for proper operation. I'm not sure how you would determine the correct length as it must be exact. I honestly didn't get far enough to try making the stock BL Touch bracket work, but there certainly wasn't any dedicated holes to mount one.Nice enough kit if you own a matching printer. Was looking forward to finally getting the Spider working and direct drive for my v2. Back on the shelf for both.