PCB prototype empty board can be used to solder LED diodes, ICs, connectors, resistors, sensors, and other electronic power components or devices with 1-inch pin spacing, suitable for hobby testing, electronic experiments, and point-to-point DIY IoT projects.Specification Color: Green(tin-plated); Material: FR4 Glass Fiber; Size: 1.2 x 1.2 inches/3 x 3 cm (L*W); The thickness of the PCB Board is 0.059inch(0.15cm); The diameter of the hole is 0.04inch(0.1cm); Pitch: 0.1inch(2.