Exquisite Shape & Precise Structure 54x50x64.3mm small size,266g weight. Exquisite design, a perfect combination of extruder and printing hotend make more powerful functions. 80N Large Torque Design The use of gear with a 3.5:1 gear ratio that perfectly matches with motor makes extrusion force up to 80N(depending on filaments). More precise control of feeding withdrawal. Dual Gear Feeding The double-toothed structure does not damage filaments, feeding is more reliable and stable. Customized Dual Fan Simulation of flow field mechanics and dual fan design results in powerful heat dissipation function and more stable model formation.