1Acrylic Shell: This coil gun toy kit is made of excellent quality acrylic material for the shell, which is sturdy and abrasion resistant, not easy to be damaged, not only beautiful but also effectively guards the circuit components and facilitates the demonstration. 2Working Principle: This electromagnetic gun DIY kit utilizes the amperometric force generated by the electromagnetic field in an electromagnetic system to accelerate a metal rod. When assembled, this is a very fun toy and a great lesson in small circuits and assembly. 3Multifunctional: This electromagnetic gun module DIY kit is both a really fun project and a great desktop toy. The coil gun displays electromagnetic force well and can target small cylindrical metal at close range. The circuit is simple, reliable and practical; 4Compact And Lightweight: This high voltage electromagnetic gun DIY kit is small in size, light in weight and easy to install, it can be well used as a teaching demonstration tool or as a toy. 5Wide Application: This electronic mini magnet shooter DIY kit has a wide range of applications and can be used for crafts, DIY, science experiments, teaching demonstrations and so on, very practical. 1 x Energy Storage Electrolytic Capacitor 1 x Diode 1 x Voltage Regulator Diode 1 x 2pcs AA Battery Holder 2 x M2 x 6 Screws 10 x M2 Nuts 2 x Color Ring Resistors 2 x Red LEDs 2 x Green LEDs 2 x Transistors 1 x Magnetic Ring Transformer 4 x Tinned Wires 1 x Toggle Switch 1 x Tact Switch 1 x Electromagnetic Gun Coil Set 1 x Plastic Gun Barrel 1 x 3mm Heat Shrink Rube 1 x Main PCB Board 1 x Secondary PCB Board 5 x Iron Pillar Cannons 4 x Copper Columns 8 x M3 x 6 Screws 4 x M3 Nuts 1 x 3mm Heat Shrink Tube 4 x Nylon Washers 1 Set x Acrylic Shell (6 Pieces) 8 x M2 x 10 Screws 4 x M3 x 12 Screws