PCB board 17 pieces kit various sizes The PCB board set comes with a 17pcs protoboard which is enough for DIY soldering, prototyping, arduino boards and other small projects. 6 DIFFERENT SIZES - The PCB board includes sizes of 2x8 / 3x7 / 4x6 / 5x7 / 6x8 / 7x9cm. All PCB boards have beveled edges. BOTH PCB BOARD - The PCB board is well crafted, double sided design and letter indicators representing each column of holes on one edge. Features Thickness: about 1.6mm Hole diameter: approx. 1.0mm Material: fiberglass Color: basic green, silver tone Kit includes 3Pcs 2 X 8CM  3Pcs 3 X 7CM  3Pcs 4 X 6CM 3Pcs 5 X 7CM  3Pcs 6 X 8CM  2Pcs 7 X 9CM