This glass fiber PCB double-sided board is an electronic board arranged according to the standard IC spacing (2.54mm). Suitable for point-to-point DIY soldering, electronic projects, circuit design/testing, computer boards, and teaching circuits. Specially designed for beginners to test and learn. The prototyping boards we provide here are in the size of: Dimension: 20mm x 80mm / 0.79 x 3.15 inch (W*L); Thickness: 1.6mm / 0.06 inch; Tinned Hole Diameter: 1mm / 0.04 inch; Tinned Hole Pitch: 2.54mm / 0.1 inch Made of FR-4 glass fiber, double sided with tinned through holes. The boards are durable and the tinned holes can take heat without lifting off. The green layer on the surface of the board is used to protect the formed circuit diagram. The pre-drilled holes in each corner are great for building with two layers. In the electronic design competition, the work usually needs to be completed within a few days. Our fiberglass double-sided PCB board totally meets this requirement because the components can be soldered freely. Please pack it with newspaper to prevent oxidation of the solder hole. If the solder hole is oxidized and cannot be tinned well, you can wipe it with an eraser.