A Perfect Seal Each And Every Time! In any professional Liquid Cooling System seal integrity is of the utmost importance. Reusable Tubing Clamps have been designed for fast and easy clamping to ensure that no leak ever touches your system. The clamps are made from a very strong plastic and are highly durable. Each clamp has a high degree of adjustability in the clamping diameter via the interlocking teeth mechanism. Most importantly, Tubing Clamps are completely reusable and can be removed with ease. In order to remove a clamp, simply twist the two interlocking teeth sections so that they no longer line up and the clamp will unlock itself. This is a simple but highly effective way to ensure a leak-proof Liquid Cooling System. Clamp Diameter Tolerances: - 3/8\" Clamps (For 3/8\" ID Tubing) - 13mm Min - 15mm Max Diameter