Product Name: Toroidal Ferrite Core Model: AS225-125A Material: Iron Overall Size: 58 x 35 x 14mm / 2.3 inch x 1.4 inch x 0.55 inch (OD x ID x H) Weight: 768g Color: Black Designed toroidal ferrite core. Widely used in power transformers, current transducers, instrument transformers, inductors, chokes, ballasts, voltage stabilizers and regulators, welding transformers, broadband transformers, filters, etc. Package Contents: 6 x Toroidal Ferrite Core Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.