Extruder Kit Left Side MK8 Aluminum 3D Printer Block This is a high quality MK8 Extruder Replacement Aluminum Alloy Block. Use it to replace your blocked/damaged extruder. This block comes in a kit form and requires assembly by the user. Since this is a very popular numerous assembly instructions and videos are available on the internet which will help you build your extruder. The MK8 Extruder is available in 3 different types – Right Side, Left Side and Right Short. These extruders differ in the direction in which the filament is extruded with respect to the extruder block. When using single extruders, any extruder can be used. When using dual extruders you can use one right side and one left side extruder as shown in the product image. Also check the Short Handle MK8 Extruder Aluminum Alloy for 3D Printer Block - Right Short . It is designed for use in different types of 3D printers, supporting both bowden and MK8 extrusion. The extruder is compatible with a NEMA 17 stepper motor and aims to reduce wiredrawing issues during remote feeding.