Feature: 1. 6 PCS KIT: Includes 20mm (0.79in), 25mm (0.98in), 30mm (1.18in), 35mm (1.38in), 40mm (1.57in) coils and a 750mm (29.53in) free forming coil. Multiple models and sizes can adapt to various work needs. 2. 3MM BRASS CORE: This induction coil kit is composed of brass wires with 3.0mm brass core, which can be heated to a high temperature of 1200℃. 3. GREAT FLEXIBILITY AND DURABILITY: These induction heater coils are flexible and can be bent for various purposes. Each coil can resist overheating and wear to ensure durability. 4. INSULATED AND PLATED: These coils are insulated for safe use, plated to avoid oxidation and ensure contact, thus providing maximum work efficiency. 5. STORAGE BOX: Equipped with a storage box, you can always carry this induction heater wires kit with you when going out to work, while keeping your studio neat and orderly. 6. WIDELY USED: Induction heater coils are mainly used to heat nuts and rusty screws to loosen them, can also be used for heat treatment of automobile, machinery, various small metal parts such as gear, pulley, bearing, etc. Specification: Item Type: Induction Heater Coil Kit Material: Brass Specification: 6 piece set of 3.0mm brass core coil combination (20, 25, 30, 35, 40, free type coil) Brass Core: Approx. 3.0mm/0.12in Application: Used to disassemble rusty bolts and nuts. Package List: 6 x Induction Heater Coil1 x Storage Box