HIGH STABILITY STANDARD RESISTORS are made fromImported Manganin Strip / Coil. (Enclosed in cylindricalBrass case and immersed in oil for coolingOil Filled Resistance Standards are available for single valuesay 10mW with accuracy of 0.05 %. Resistance Coils aremade of heavy gauge Manganin wire having virtually zerotemperature coefficient of resistance are used.10 m 25 Amps. 9 watt Accuracy + 0.05 %4 Terminals arrangement.Other available Values are 1mW or 100mW or 1W or 10W or100W or 1KW etc.It can be calibrated by NABL accredited lab. CalibrationCharges as per actual will be charged extra.Please ask for more details if interested