Forward installation improves the overall appearance of the extruder after installation. RGB light guide plate, DIY panel luminous pattern, show your uniqueness. CHT nozzle, , large flow. Dual gear feeding, adjustable preload: 7:1 gear ratio, 7.5kg maximum extrusion force, smoother feeding; dual gear bite force is adjustable, flexible filament printing is a piece of cake. Built-in throat cooling fan + double-side blow mold fan, efficient heat dissipation, no fear of high temperature. Quick material change switch, just click to feed, simple and easy to use. Colour:Black & Red Material:aluminum Package Contents: 1 * Extruder 4 * Wrench 1 * Hardened Steel Nozzle 2 * Fans 1 * Light Guide Bare Board 2 * Nozzles 1 * Belt Buckle 14 * Screws(Screw color is random, no specification is accepted) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.