heel change the yarn,multi-level rib top,foot-reinforcement,around patterned socks.And the upgraded version can be weaved 3D socks、stealth boat socks、once-molded ankle socks、five toes socks.Specifications:Cylinder Diameter3.5"/3.75’’/Needle Number72N-240NMaximum Speed330Driving ControlSever MotorVoltage220V/380VMain Motor1.3KWFan≥1.1KW(Selection)Control Box1.3KWSite Area150′120′240cmNet Weight260KGGross Weight300KGPackage Size111′77′166cm