The Fair-Rite 8978121221 is a high-quality Ferrite Toroid Core designed for a wide range of electronic applications. Constructed from Material 78, this core provides excellent magnetic properties and performance. Its dimensions include an outer diameter (OD) of 12.7mm, an inner diameter (ID) of 7.8mm, and a height (Ht) of 12.7mm. This toroid core is suitable for use in inductors, transformers, and other magnetic components. As an authorised distributor of Fair-Rite products, Supreme Components International guarantees the authenticity and quality of this ferrite core. Choose the 8978121221 for reliable and consistent performance in your electronic designs. Benefit from our extensive inventory and fast shipping options.