Feature: 1. The newly developed primary coil of this product is already in the PCB board, no need to be wound on the outside, which is convenient for fans to install. 2. High efficiency, beautiful, is a new design. The Tesla coil is very safe, no electricity, no arc, only light. 3. Can be used for student experiments, course design, etc. 4. All devices are in-line, no device is patched, and there are few devices with high success rates for beginners. 5. The frame adopts PVC material of high strength and good durability. Specification: Item Type:Tesla Coil Secondary Coil Parameters: Enameled Wire Diameter: 0.13 mm (with Paint 0.15 mm) Skeleton Material: PVC Pipe Skeleton Outer Diameter: 2cm Skeleton Height: Approx. 4cm Number Of Turns: 200 Laps Winding Direction: Clockwise From Bottom to Top Battery:3 x AA Battery(Not Included) Type:(Optional) Assembly Kit Finished Product. Package List: 1 x Finished Tesla Coil