Item Type: PCB Board Kit Material: PCB PCB Board: Hole Spacing: Approx. 2.54mm/0.10in Header Connector: Spacing: Approx. 2.54mm/0.10in Pin Number: 40 Terminal: Rated Voltage: 300V Rated Current: 16A 1¡¢This set of PCB sets requires low usage, low cost, and it is convenient to use and of flexible expansion. 2¡¢The double side PCB board is suitable for beginners in electronics and soldering projects. 3¡¢With many types of products in this package, and PCB boards of different sizes can be used in a variety of environments. 4¡¢Using standard hole spacing and hole size, this design is more convenient for users to replace parts. 5¡¢Professional design and superb workmanship make this set of double side PCB boards a perfect replacement for old PCB boards.5 x PCB Board(2 x 8cm) 5 x PCB Board(3 x 7cm) 5 x PCB Board(4 x 6cm) 5 x PCB Board(5 x 7cm)  10 x Male Connector 10 x Female Connector 10 x Terminal