The gears are quenched and nickel-plated and use double bearings to improve transmission accuracy and stability. Double gear structure Increase the grip of consumables Reduce slippage High transmission ratio Increase torque Use double bearings to improve transmission Performance, accuracy and stability Increase extrusion thrust Extrusion rotating gear bounce 0.3mm The reduction gear and the handle gear both adopt a double bearing design. The two gears are post-processed, quenched and electroplated to make them more wear-resistant. They extend the service life and improve the printing quality. Colour:Black Material:Nylon + carbon fiber Package Contents: 1x Extruder 2x M3x6 cylindrical hexagon screws 2x M3x8 cylindrical hexagon screws 1x M3x8 countersunk hexagon screws 1x M3x25 cylindrical hexagon screws 1x 2.5mm hexagon wrench 1x 2mm hexagon wrench 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.