Features: Adopts quality sheet metal and linear guide rail, which ensure smooth movement and improve printing accuracy. The extrusion mechanism and heat dissipation are integrated to ensure smooth feeding and perpendicularity. Integrated stepper motor and material breakage detection eliminates the need to worry about unexpected power outages. Visualization red extrusion wheel, making feeding easier and allowing real-time observation of machine conditions. 12V/24 with or without guide rail, easy installation and convenient use. Specifications: Material: Metal Type: 12V with Rail, 12V without Rail, 24V with Rail, 24V without Rail(optional) Size: subject to the actual object Applicable Models: for Ender3 /CR10 Series 3D Printers Note: Please allow 0-1cm error due to manual measurement. Please allow for slight color difference due to different display resolution. Package includes: 1x Integrated Direct Extrusion Multifunctional Extruder Kit 1x 12C Slider + 1x MGN12C Linear Rail(optional) 1x Broken Material Detection Line 1x Motor Extension Line 1x Tool Kit