Prototype PCB for Arduino Mega 2560 R3 Shield Board DIY. Quantity: a lot of 1 piece. PCB Dimension: 101.6mm x 53.34mm / 4" x 2.1" PCB Thickness: 1.6mm Material: high quality FR-4 glass fiber PCB. All holes are plated through Dual copper layers. Pads grid (pitch) 2.54mm / 0.1", hole diameter 0.9mm. If you want buy these tall header socket connectors, you can visit my store.