The ST221-8I from Piconics is a RF Inductor with Inductance 0.16 to 0.22 uH, DC Resistance 0.6 Ohms, DC Current 0.18 A, Self Resonant Frequency 400 MHz, Operating Temperature -55 to 125 Degree C. Tags: Thin Film Inductor. More details for ST221-8I can be seen below.