Product Description: The TT4040B copper water cooling block is designed for high-efficiency liquid cooling in both computer and industrial applications. Manufactured from solid pure copper, it offers excellent thermal conductivity for rapid heat transfer. The internal cooling channels are precision formed and permanently brazed into a sealed structure to promote consistent coolant flow while reducing the possibility of leakage. Smooth machined surfaces provide improved contact with cooling components for better thermal performance. With a compact 40 × 40 × 10 mm body, this cooling block is easy to integrate into custom cooling systems. The integrated hose barbs measure approximately 8.5 mm at the widest point and are compatible with tubing around 7 mm inner diameter. Ideal for CPU and GPU water cooling, semiconductor cooling modules, laser equipment, inverter drivers, industrial control cabinets, TEC cooling projects, and other DIY liquid cooling applications.