The PR12 from Viking Tech America is a Resistor with Resistance 10 Ohms to 1.5 MOhms, Power Rating 500 mW, Temperature Coefficient (TCR) ±15 ppm/Degree C, ±25 ppm/Degree C, ±50 ppm/Degree C, Tolerance ±0.1%, ±0.25%, ±0.5%, Voltage Rating 150 V. Tags: Surface Mount, Chip. More details for PR12 can be seen below.