This is a bare PSU PCB for "Extreme Hi-End Hybrid Amplifier End" by the designer, audio expert Mr. Andrea Ciuffoli. According to some diyers, this amplifier is the best sounding amplifier they have heard. For the project details, please refer to designer's official website : https://www.audiodesignguide.com/Ibridone/index5.html Each PSU board is designed for both left and right audio channel. We do air shipping worldwide at US$7.00. PSU PCB thickness : 1.6mm. Copper thickness : 75um( 4 times normal thickness !!!)Dimension : 130mm x 152mm The corresponding amplifier board is also listed in our shop.