This is the circuit board for the Decware Zen Triode DIY amplifier aka ZKIT1. Rev 2025 . The board is 6 x 6 inches.ZKIT1 BoardSKU: ZKIT1board$45.00PriceShipping InfoQuantity*Add to CartBuy NowAssembly Instructionshttps://www.decware.com/newsite/ZKITmanual2020.pdf Schematic 2025https://www.decware.com/newsite/ZKIT1.pdf