This heat shrink tube has a diameter of 20mm and is designed to provide insulation and protection to electrical wires and cables. It has a temperature rating of up to 125°C, a voltage rating of 600V, and is rated as VW-1 for flammability. The operating temperature range is between -55°C to +125°C. The heat shrink tube can shrink to half of its original diameter when heat is applied, providing a snug fit around the wire. It is commonly used in electrical and electronic applications to insulate and protect wires, provide strain relief, and prevent damage from abrasion, chemicals, and moisture.