The Perfect Seal fittings stand for, as the name implies, a perfect seal with 3 / 8 "tubing.

Note for watercooling beginners:
The connectors for imperial hoses (7 / 16 ", 3 / 8 ", ½ ") are provided with measurements in mm in our shop. These can differ by +-1mm, Which is no problem as hose clamps have to be used for installation. If the hose is to be mounted without a clamp chosen, a larger fitting should be. With some fittings that tend to be larger, though it is possible that a hose with an inner diameter of 13mm actually does seal without a hose clamp.

Technical specifications:
Material: Silver nickel plated brass
Thread length: 6mm
Compatible with hoses with an inner diameter of 10mm (3 / 8 ")
Fitting inner diameter: 10m
Upper fitting outer ring: 12.4 mm
Middle hose contact surface: 11.6mm
Key width: 16mm