TRANSFORMER CORE INDUCTORS Specifications: Conductor: 99.99% Oxygen-free Copper. Round enamelled wire. Insulation: Type V Enamel. Bobbin material: ... ABS (Plastic) Dimensional stability: 85°C. Inductance values tested at 1KHz / 25°C Inductance tolerance: +/- 3%. Connecting leads: 150mm Core type: High quality E type grain oriented silicon iron laminations. These Transformer-core inductors are impregnated in Polyurethane resin as a protection against corrosion as well as to attenuate vibration of the coil-windings. They offer high power handling, very low dc resistance as well as the most favourable saturation characteristics.