Features Low requirements for use, easy to use, simple to operate, flexible to expand, suitable for beginners in electronics and welding projects. Using sophisticated production technology, with excellent performance, suitable for a variety of environments. There are many types, which can meet different needs and provide many choices for DIY electronics projects. Adopting compact and elegant packaging, easy to store and take out the product, easy to carry, can be carried around. Made of high quality materials, this double sided boards kit is sturdy, durable, not easily damaged, and has a long service life. Specification: Item Type: Double Sided Boards Kit PCB Board: Material: PCB Hole Spacing: Approx. 2.54mm / 0.10in Connector: Pitch: Approx. 2.54mm / 0.10in Number of Pins: 40 Pins Terminal: Rated Voltage: 300V Rated Current: 16A Jumper Pitch: Approx. 2.54mm / 0.10in Package List: 10 x Prototype PCB General Boards 2x8cm  10 x Prototype PCB General Boards 3x7cm  5 x Prototype PCB General Boards 4x6cm 5 x Prototype PCB General Boards 5x7cm 10 x 40 Pins Male Connectors 10 x 40 Pins Pitch Right Angle Males 10 x 40 Pins Female Connectors 5 x 5.08-301-2P 5 x 5.08-301-3P 30 x Jumpers 1 x Plastic Box Package List 10 x Prototype PCB General Boards 2x8cm 10 x Prototype PCB General Boards 3x7cm 5 x Prototype PCB General Boards 4x6cm 5 x Prototype PCB General Boards 5x7cm 10 x 40 Pins Male Connectors 10 x 40 Pins Pitch Right Angle Males 10 x 40 Pins Female Connectors 5 x 5.08-301-2P 5 x 5.08-301-3P 30 x Jumpers 1 x Plastic Box