Features: No soldering required, easy and quick to build circuit prototypes and reduce operational difficulties. Large number of holes with 3220 holes, it is suitable for a variety of complex circuit testing and experimental needs. High-quality plastic material, with good electrical insulation properties . Double side hole layouts, providing more connection for flexible wiring. for engineers, electronics students or lab personnel for circuit verification, prototyping and teaching experiment scenario. Specifications: Size about 18.7x19.1x0.85cm/7.36x7.51x0.33in Component:ABS Holes:3220 Package Includes: 1PC Solderless Breadboard note: Due to the problemsof lighting effectsand shootingangles, there will be tolerances in product, please understand. Please allow 0-1cm error due to manual measurment