FERROXCUBE Ferrite Ring Toroid Core 6.55 mm, For: Current Regulation, Choke, Energy Storage, Transformer 9.35 mm ID

Ferrite cores offered in 4 varieties of different materials.
The models with an external diameter of less than 9 mm are dark grey, regardless of material. For the other diameters, the core is white.
Recommended for various applications such as making transformers, smoothing chokes, current regulators or even energy storage.