The 28MG391K from Gowanda Electronics is a RF Inductor with Inductance 3.9 uH, DC Resistance 450 mOhms, DC Current 0.955 A, Self Resonant Frequency 95 MHz, Operating Temperature -55 to 125 Degree C. Tags: Non-Magnetic Inductor, Molded Inductor. More details for 28MG391K can be seen below.