Description Electromagnetic induction heating coil kit includes seven commonly used prefabricated diameter coils and one free coil, suitable for a wide range of applications. Includes: 1 x 18mm internal diameter, 1 x 22mm internal diameter, 1 x 28mm internal diameter. The free-formed coil length is 100cm. Each coil resists overheating and premature wear, designed for durability and repeated use. Coils are flexible and can be bent to meet various application needs. Electroplated to resist oxidation and ensure reliable contact for efficient performance. Insulated and coated to provide protection and reduce wear. Replace coil if insulation is damaged. Parameter Material: Copper Size: - Free coil: 100cm - 21x3cm, inner diameter: 1.8cm - 21x3.5cm, inner diameter: 2.2cm - 21x4cm, inner diameter: 2.8cm Package includes 4 x Heating coils