Our Midi Spring® air core inductors have exceptionaly high Q factors and very tight inductance tolerances, making them suitable for narrowband RF amplifier matching and tuning applications.  As their name implies, air core inductors do not use a magnetic core, resulting in high Q and the lowest possible losses for high-frequency applications.  They can withstand high temperatures, meeting AEC-Q200 Grade 1 (−40°C to +125°C) requirements.  High-reliability versions are available for space, military, and other critical applications.