The GWS 20 Ni from Vishay is a Power Resistor with Resistance 5.1 to 1300 ohm, Tolerance ± 5 to 10 %, Power Rating 15 W, Voltage Rating 300 V, Temperature Operating Range -55 to 350 Degree C. Tags: Screw Mount. More details for GWS 20 Ni can be seen below.