... 4.Can provide the knob with customers requirement.Commonspecification25W,50W,100W,150W,300W,500W,1000W,1500W,2000W,2500W,3000W ect. Performance ... Test itemTest conditionperformanceInsulationresistanceJIS-C-5261 6-1 500V DC 100 MΩ MinDielectricwithstandingvoltageJIS-C-5261 7-1 1000V DC 60s Between ... ,dimension and packing .3. More details, please contact us. 100W Variable Rheostat(BCI)