40×40 Thermoelectric Cooler–Specific Integrated Labyrinth Flow‑Channel Water Block | 3D‑Printed, Weld‑Free DIY Universal Water Cooler – Labyrinth Return Flow Channel: A multi‑layer internal baffle design prevents water short‑circuiting and maximizes heat‑transfer surface area, delivering significantly improved cooling performance compared to straight‑through water blocks.

- One‑Piece Leak‑Proof Construction: Entirely printed in a single piece with no joints; paired with appropriately designed wall thickness and infill, it effectively eliminates leaks, making it accessible even for beginners.

- Standard Interface Compatibility: The outlet is compatible with 6 mm silicone tubing or air hoses, supporting commonly available miniature water pumps and water‑cooling components.

- Precise Dimensional Fit: The top surface features a smooth 40×40 mm contact area that perfectly matches the hot side of the 12706 series thermoelectric coolers; simply apply thermal paste for installation.

- Compact and Streamlined Design: With a highly compact footprint, this water block takes up minimal space, ideal for mini water chillers and portable cooling solutions.