The Vishay Angstrohm portfolio of products is made up of hermetic metal film resistors and power rheostats. The hermetically sealed resistors are moisture-proof and ideal for use in hostile environments. They feature a true glass-to-metal hermetic enclosure that seals the resistor element in an inert gas atmosphere and protects it from virtually all adverse environmental influences. Due to the high reliability and stability characteristics of Vishay Angstrohm resistors, they are used extensively in military, missile, and aerospace applications where resistance to hostile environments is a critical parameter. Vishay Angstrohm rheostats provide resistance or ratio adjustments for optimizing circuit performance.