The Fair-Rite 2744555577 is a high-quality Ferrite Toroid Core, available through Supreme Components International, an authorised distributor. This core is constructed from Material 77, known for its excellent performance characteristics in a wide range of frequencies. The core's dimensions are: Outer Diameter (OD) 44.5mm, Inner Diameter (ID) 22.9mm, and Height (Ht) 12.7mm. This toroid core is commonly used in inductors, transformers, and other magnetic components. Its toroidal shape provides excellent magnetic flux containment, minimizing electromagnetic interference (EMI). The Material 77 composition ensures optimal performance in power electronics and signal processing applications. Choose Fair-Rite for reliable and consistent performance.