UNO R3 Shield Board DIY Prototype PCB Quantity: 10 pieces PCB Dimensions: 68 58mm X 53 34mm / 2 7" X 2.1" PCB Thickness: 1. 6mm Material: High quality FR-4 fiberglass PCB. All holes are plated through the top and bottom with the same copper layer. Pad grid (pitch) 2.54 mm / 0.1" Hole diameter 0. 9mm If you want to purchase these tall header socket connectors, you can visit my store.