Prototype PCB for Arduino Mega 2560 R3 Shield Board DIY.Quantity: a lot of 10 pieces.PCB Dimension: 101.6mm x 53.34mm / 4" x 2.1"PCB Thickness: 1.6mmMaterial: high quality FR-4 glass fiber PCB.All holes are plated throughDual copper layers.Pads grid (pitch) 2.54mm / 0.1"， hole diameter 0.9mm.