Creality Ender-3 S1 3D Printer, Sprite Dual-gear Direct Extruder, Dual Z-axis Sync, Bend Spring Sheet to Release Print, 220*220*270mm. The proprietary “Sprite” direct extruder is configured with 1:3.5 dual-gear delivers a 80N force to achieve smooth feeding and release of filament without slipping, less inertia and more precise positioning. Comes with 2 Z-axis screws, each configured with 1 motor, to print more synchronously to minimize lines and ridges on the edges of your print and help you print delicate art piece. PC layer provides good adhesive. Bend the PC layer(beneath it is a spring sheet) and quickly release the print work. 32 bit motherboard runs at low decibel. Resume print after filament refill/power on. No layer shifting caused by inadequate tightness with belt tensioner. More smart with the UI interface: print, prepare, control, level(16-point leveling). The 3D printer is compatible with multiple filaments including PLA, TPU, PETG, ABS, etc. Buy this and Save $42.16 OFF with coupon code: GKBGKB02 at checkout. Now $420.58 for Creality Ender-3 S1 3D Printer.