Feature: 1. Tin Spraying Process: Double sided green oil CNC spraying tin process, 2.54mm pitch, convenient for welding, not easy to oxidize, not easy to deform, and high temperature resistance. 2. Extra Large Hole: The pin component holes are all designed as extra large holes (1.0mm), which can install almost all conventional pin components. 3. Signal Access Pads: Signal access pads are added on both sides of the board to facilitate the production of some engineering prototypes or engineering prototypes with signal input. 4. Application: Suitable for college students, engineers, technicians, factories, personals DTY, electronic enthusiasts, etc. 5. FR-4 Sheet + Tin: Durable FR-4 sheet, tin material, with a thickness of 1.6mm, making very strong circuit board. Specification: Item Type: DIY Prototype Board Material: FR-4 Sheet Material, TinUses: for College Students, Engineers, Technicians, Factories, Personals DTY, Electronic Enthusiasts, etc. Thickness: Approx. 1.6mm / 0.06in Specification: Approx. 3cm x 7cm / 1.2in x 2.76in Hole Distance: Approx. 2.54mm / 0.10in Aperture: Approx. 1.0mm / 0.04in. Package List: 10 x Circuit Board