This double sided porotype board is widely used among electronic experiments and DIY soldering projects. With the perfect designed pre-tined holes on the board you can easily install any sensors and components you need. The of glass fiber material and the great durability of the board can always meet you requirements in various situation. Features - Color: Shown in the pictures. - Material: Glass fiber FR4. : 4x6/ 3x7/ 5x7/ 2x8/ 7x9 CM - Quantity: 32 pieces in total of 5 different sizes. - Thickness: about 1.6mm. - Color: Green basic, silver tone. - Hole-pitch: 2.54 mm/ 0.1 inches. - Hole-diameter: 1 mm/ 0.04 inches. - 32 pieces double sided PCB boards well packed in a plastic tray which is very easy to store and take out. - 5 different size boards to meet your demands when designing your own electronic experiments and DIY projects - 4 mounting holes at the corners of the board are very convenient for installing them together. - Pre-tinned plated holes on the board make it very handy to solder components and sensors for your projects - of durable glass fiber -FR4 material with 1.6mm thickness makes a very solid and sturdy circuit board Package list: 6pcs 4X6CM double-sided PCB board with 280 holes 10pcs 3X7CM double-sided PCB board with 240 holes 7pcs 5X7CM double-sided PCB board with 432 holes 7pcs 2 X 8CM double-sided PCB board with 168 holes 2pcs 7 X 9CM double-sided PCB board with 806 holes