Material: Made of green Basic Silver tone layered Fiberglass FR-4 which is flame resistant and self-extinguishing with in between High Grade Copper for optimum power conduct. High Precision cut out Pin Holes No More Circuit Failure. Easy to Snap the board together in a group. soldering masks are used as the finishing touch to easily connect your components or sensors to the circuit boards Set contains: 4 different sizes of PCB BreadBoards Circuit boards: 5x 8 x 2cm, 5x 7 x 3cm, 5x 6 x 4cm , 5x 7 x 5cm, 1.5mm thick. Pre-tinned holes for easy installation of sensors and components. Hole spacing is 2.5mm. Super kit for your Raspberry Pi and Arduino Projects 10x 40 pin male Header / 10x 40 Pin Female Header / 10x Screw Terminal Block Connector 2-Pins 5mm pitch / 10x Screw Terminal Block Connector 3-Pins 5mm pitch, voltage: 300V / 16A Easy to Use: All PCB Bread Boards are double-sided with pre-tinned holes, which makes the soldering of various components super easy. Each board has 4 mounting holes on each corner to install the boards easy to your liking Product provided by MMOBIEL - We always try our best to exceed your expectations at every turn. Join the ever growing list of satisfied customers and discover the difference with MMOBIEL.