PEM Hydrogen Fuel Cell Proton Exchange Membrane Fuel Cell New Energy High School Laboratory Teaching Accessories 50x50MM Features: Electrochemical device, no pollution, no harmful substances emission Exquisite workmanship, compact size, portable and easy to use Specifications: Name: Hydrogen Fuel Cell Type: PEM Size: 50x50MM Note: product colors blue and white are shipped randomly! Name: Hydrogen Fuel Cell Type: PEM Size: 50x50MM Electrochemical device, no pollution, no harmful substances emission Exquisite workmanship, compact size, portable and easy to use