Simple Operation: These prototype boards are simple to operate, easy to use, flexible to expand, not easy to damage, and have a long service life. High Temperature Resistant: The prototype boards are insulated, nonstatic, wear resistant and high temperature resistant. Excellent Performance: Has excellent performance, good electrical performance at room temperature, and good mechanical processing performance. Applicable People: Suitable for college students, engineers, technicians, factories, electronics enthusiasts, etc. Strong Durable: Made of high quality materials, these prototype boards are strong, durable, and have fine workmanship. 20 x Prototype Boards Item Type: Prototype BoardMaterial: 94HB Bakelite PlywoodUses: College Students, Engineers, Technicians, Factories, DIY, Electronics Enthusiasts, Etc.Product Size: Width: Approx. 5cm / 2.0in, Length: Approx. 7cm / 2.8inProduct Thickness: Approx. 1.2mm / 0.05inHole Distance: Approx. 2.54mm / 0.1inAperture: Approx. 1mm / 0.04inNumber of Holes: 432 (Width 18 Lines Long 24 Lines) Item Type: Prototype BoardMaterial: 94HB Bakelite PlywoodUses: College Students, Engineers, Technicians, Factories, DIY, Electronics Enthusiasts, Etc.Product Size: Width: Approx. 5cm / 2.0in, Length: Approx. 7cm / 2.8inProduct Thickness: Approx. 1.2mm / 0.05inHole Distance: Approx. 2.54mm / 0.1inAperture: Approx. 1mm / 0.04inNumber of Holes: 432 (Width 18 Lines Long 24 Lines)