This is a pure copper wire rolled around a flexible plastic core. It’s great for all your DIY vape coil building needs. General-purpose utility grade copper tubing for water supply applications, including ice makers, humidifiers, water purification systems, dishwashers, and other appliances. Boxed. AC Copper Coils and tubing for all air conditioning & refrigeration needs. • Wonderful plasticity, easy to machining under hot and cold pressure. • Copper tubes have a large heat transmission capability due to their cylindrical shape. uaehvac.com