Features: Double side PCB protoboard with 2.54mm hole spacing enables complex circuit layouts for advanced compatible electronic projects. Features 1.6mm thick boards with precisely 1mm holes, combining durability construction with professional soldering performances. Ideal for electronics engineers, educators, and DIY enthusiasts requiring reliabled prototyping solution for experimental circuits and microcontroller integrations. Perfect for developing base automation systems, creating customizable sensoring arrays, and building module electronics prototypes in lab or maker workshops. The 3 piece set of 20x30cm boards accommodates multiple iterations of complex designs, with standardized spacing ensuring component compatibility across projects. Specifications: Material: Plastic + Metal Name: Single Side Universal Board Thickness: 1.6mm Material: single-side fibreboard Size: about 20x30cm/7.87x1.18in Hole distance: 2.54mm Hole diameter: 1.0mm Weight: 95g Quantity：3PCS Package Includes: 3PCS double side PCB Board note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.