Hello,We are looking for Modbus (RS485) supported driver for Stepper Motor & also stepper motors with the following Holding Torque:4.5Nm (2Nos)8Nm (2Nos)10Nm (1No)12Nm (1No)15Nm (1No)20Nm (1No) Input Voltage: 220Volts ACOnce the units are tested, we will be placing order for bulk quantity.