The Airco Electronics CF 1/2 Carbon Film Resistors are high-quality electronic components with a resistance rating of 51k Ohms and a power rating of 0.5W. This box contains 1000 units, each with a tolerance rating of ±5%. These resistors are ideal for various electrical and electronic applications, offering reliable performance and stability in electronic circuits. The Airco Electronics brand ensures a trusted and consistent product for your needs.