The ER18M121JKR from Gowanda Electronics is a RF Inductor with Inductance 1.2 uH, DC Resistance 0.4 Ohms, DC Current 785 mA, Self Resonant Frequency 180 MHz, Operating Temperature -55 to 125 Degree C. Tags: Ceramic Inductor, Wire Wound Inductor. More details for ER18M121JKR can be seen below.