Geeetech A20T 3D printer adopting open source GT2560 control board delivers mix-color objects and greatly enriches your 3D printing life. Keeping the good performance of Geeetech’s portfolio of 3D printers it aims to provide users with quality printout and satisfactory printing experience.Printing parameters Printing technology: FDM Build volume: 255*255*255 mm 3Printing accuracy: 0.1mm Positioning precision: X/Y：0.011mm. Z： 0.0025mm Printing speed: 120 mm/s (max) Filament diameter: 1.75mm Nozzle diameter: 0.4mm Filament: ABS / PLA/wood-polymer/PVA/HIPS/PETG etc. Max temp for hotbed: 100℃Max temp for extruder: 250℃ Mechanical:Frame: Aluminum profile XY Rods: Wear-resistant aluminum profile Z axis: Lead screw Stepper Motors: 1.8°step angle with 1/16 micro-stepping Physical Dimensions & Weight Machine Dimension: 442 x 447 x 480mm3 Shipping box Dimension: 510x495x325 mm Machine Net weight: 9kg Machine Gross weight: 11.5 kg NOTE:1.Pls switch the Power Supply Unit to 115V set before turning on the printer. 2.If the slicing software you use is Cura you need to modify the parameters of nozzle temperature and hot bed temperature. 3.If you purchased and installed 3d touch yourself pls refresh the firmware firstly. 4.If the slicing software you use is Cura you need to modify the parameters of nozzle temperature and hot bed temperature. as the picture shows.