Full Sizes20Pcs double-sided PCB boards in 4 different sizes 40x60/ 50x70/ 30x70/ 20x80 MM to meet your demands in various situation SpecificationMaterial: Glass Fiber (FR-4), with Pre-tinned Hole. Thickness: approx. 1.6mm, Hole Pitch: approx. 2.54mm, Hole Diameter: approx. 1 mm FeaturesDouble sided. The plated holes are pre-tinned/pre-coppered and very solid which makes them very easy to soldering components on. ApplicationsSolderable PCB enables you to transfer your circuit and wires from a plug-in breadboard without cutting wires or changing your layout. Suitable for point to point DIY soldering, Electronic Projects, Practice Soldering, Design, and Test Circuit, Computer Board, Making Prototyping Board, Teaching or Learning Circuit. Package Content5pcs 40x60mm, 5pcs 50x70mm, 5pcs 30x70mm, 5pcs 20x80mm