Glass wool is a good conductor of electricity .

Explanation

**Step-by-Step Solution:**

1. **Understanding the Material**: Glass wool is a material made from fine strands of glass. It is commonly used for insulation purposes due to its properties.

2. **Properties of Glass Wool**:
- Glass wool has low thermal expansion, meaning it does not expand or contract significantly with temperature changes.
- It has remarkable conductivity, but this refers to thermal conductivity, not electrical conductivity.
- It can withstand high temperatures (up to 1000°C) and has excellent resistance to corrosion from molten metals.
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