Description: Material : double Side Copper PCB Hole Dia: about 1mm Hole pitch: standard 2.54mm Quantity: 20pcs For point to point DIY soldering Dimension: 5x7 4x6 3x7 2x8 cm Package Included: 5 x Prototype PCB Board 5*7cm 5 x Prototype PCB Board 4*6cm 5 x Prototype PCB Board 3*7cm 5 x Prototype PCB Board 2*8cm