🔧 Build, Create, Innovate! 4 corner mounting holes for seamless installation and stability. Ideal for Arduino enthusiasts and DIY IoT projects. Constructed from high-quality FR-4 glass fiber for long-lasting projects. Transform your ideas into reality with this comprehensive prototype kit. Craft your own electronic masterpieces with 6 versatile sizes! 6 Sizes Double Sided 40 Pcs The BOJACK 6 Values 40 Pcs Double Sided PCB Board Prototype Kit is a versatile and durable solution for DIY electronics enthusiasts. With six different sizes of high-quality FR-4 circuit boards and convenient mounting options, this kit is perfect for Arduino projects and electronic experiments.