Features: The position of the gear and the accuracy of all screw holes are calibrated. Double extrusion wheels.The high quality feeding gear can minimize slippage and increase feeding force. The filament- has an independent motion cabin inside the extruder. The white filament- guide is made of a mixed material with lubricating properties-. Its interior is very smooth, and it can withstand your crazy parameter settings .The BMG extruder is used for various materials of nylon and soft TPU TPE. The extruder is designed for a 1.75mm consumable . The reduction gear device can also give the extruder greater torque while reducing the burden on the motor and extending its lifespan Specifications: Filament diameter:for 1.75mm Color: Black Size: as the Pictures Type: BMG Reduction Extruder Package Includes: 1PC x BMG Reduction Extruder note: Due to the different monitor- and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 0.3-0.5cm measuring deviation- due to manual measurement.