Copper Purity Comparison
Top-level oxygen free copper(OFC) with bright coat. High-content impurity or oxidation lead to higher resistivity, heating and even short circuit.

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Resistivity Test
Our product has lower resistance and higher conductivity. This wire has higher resistance and it leads to easy heating, what's worse short circuit or fire.

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Eccentricity Test
Our product's insulating layer is even and safer. Uneven layer can easily lead to electric leakage and even breakdown.

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High Voltage Test
The coat of our product is intact. The coat of this wire is breakdown and the copper core is out.

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Low Temperature Winding Test
The coat of our product is intact. The coat of this wire is breakdown and the copper core is out.